Great Retreat (Russian)
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The Great Retreat was a strategic withdrawal on the Eastern Front of
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
in 1915. The
Imperial Russian Army The Imperial Russian Army (russian: Ру́сская импера́торская а́рмия, tr. ) was the armed land force of the Russian Empire, active from around 1721 to the Russian Revolution of 1917. In the early 1850s, the Russian Ar ...
gave up the salient in
Galicia Galicia may refer to: Geographic regions * Galicia (Spain), a region and autonomous community of northwestern Spain ** Gallaecia, a Roman province ** The post-Roman Kingdom of the Suebi, also called the Kingdom of Gallaecia ** The medieval King ...
and the
Vistula Land Vistula Land, Vistula Country (russian: Привислинский край, ''Privislinsky krai''; pl, Kraj Nadwiślański) was the name applied to the lands of Congress Poland from 1867, following the defeats of the November Uprising (1830–3 ...
. The
Russian Empire The Russian Empire was an empire and the final period of the Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended the Great Northern War ...
's critically under-equipped military suffered great losses in the
Central Powers The Central Powers, also known as the Central Empires,german: Mittelmächte; hu, Központi hatalmak; tr, İttifak Devletleri / ; bg, Централни сили, translit=Tsentralni sili was one of the two main coalitions that fought in W ...
' July–September summer offensive operations, which led to the
Stavka The ''Stavka'' (Russian and Ukrainian: Ставка) is a name of the high command of the armed forces formerly in the Russian Empire, Soviet Union and currently in Ukraine. In Imperial Russia ''Stavka'' referred to the administrative staff ...
ordering a withdrawal to shorten the front lines and avoid the potential
encirclement Encirclement is a military term for the situation when a force or target is isolated and surrounded by enemy forces. The situation is highly dangerous for the encircled force. At the strategic level, it cannot receive supplies or reinforcemen ...
of large Russian forces in the salient. While the withdrawal itself was relatively well-conducted, it was a severe blow to Russian morale.


Background

Following the German success with their
Gorlice–Tarnów offensive The Gorlice–Tarnów offensive during World War I was initially conceived as a minor German offensive to relieve Russian pressure on the Austro-Hungarians to their south on the Eastern Front, but resulted in the Central Powers' chief offensi ...
, Hans von Seeckt proposed that
August von Mackensen Anton Ludwig Friedrich August von Mackensen (born Mackensen; 6 December 1849 – 8 November 1945), ennobled as "von Mackensen" in 1899, was a German field marshal. He commanded successfully during World War I of 1914–1918 and became one of ...
's Eleventh Army should advance north towards
Brest-Litovsk Brest ( be, Брэст / Берасьце, Bieraście, ; russian: Брест, ; uk, Берестя, Berestia; lt, Brasta; pl, Brześć; yi, בריסק, Brisk), formerly Brest-Litovsk (russian: Брест-Литовск, lit=Lithuanian Br ...
, with their flanks shielded by the rivers
Vistula The Vistula (; pl, Wisła, ) is the longest river in Poland and the ninth-longest river in Europe, at in length. The drainage basin, reaching into three other nations, covers , of which is in Poland. The Vistula rises at Barania Góra in ...
and Bug. Mackensen and Chief of the German Great General Staff
Erich von Falkenhayn General Erich Georg Sebastian Anton von Falkenhayn (11 September 1861 – 8 April 1922) was the second Chief of the German General Staff of the First World War from September 1914 until 29 August 1916. He was removed on 29 August 1916 after ...
supported this strategy of attacking the Russian salient in Poland, and forcing a decisive battle. Ober Ost, led by Paul von Hindenberg and
Erich Ludendorff Erich Friedrich Wilhelm Ludendorff (9 April 1865 – 20 December 1937) was a German general, politician and military theorist. He achieved fame during World War I for his central role in the German victories at Liège and Tannenberg in 1914. ...
, would attack towards the southeast, while Mackensen turned north, and the Austro-Hungarian Second Army attacked east. The ''Ober Ost'' Twelfth Army, led by
Max von Gallwitz Max Karl Wilhelm von Gallwitz (2 May 1852 – 18 April 1937) was a German general from Breslau (Wrocław), Silesia, who served with distinction during World War I on both the Eastern and Western Fronts. Biography Gallwitz grew up in a Cath ...
, would advance to the northeast of
Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is officiall ...
, while the Ninth Army, led by
Prince Leopold of Bavaria Prince Leopold of Bavaria (Leopold Maximilian Joseph Maria Arnulf; 9 February 1846 – 28 September 1930) was born in Munich, the son of Prince Regent Luitpold of Bavaria (1821–1912) and his wife Archduchess Augusta of Austria (1825–1864). H ...
, the Woyrsch Corps, led by Remus von Woyrsch, and the Austro-Hungarian First Army, led by Paul Puhallo von Brlog, pushed the Russians eastward to the Vistula. The Army of the Bug, led by
Alexander von Linsingen Alexander Adolf August Karl von Linsingen (10 February 1850 – 5 June 1935) was a German general during World War I. Military service Linsingen joined the Prussian Army in 1868 and rose to Corps Commander ( II Corps) in 1909. He was one of th ...
, the Austro-Hungarian
Second The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds ea ...
and Seventh Armies, led by Eduard von Böhm-Ermolli and
Karl von Pflanzer-Baltin Karl Freiherr von Pflanzer-Baltin (1 June 1855, Pécs, Hungary - 8 April 1925, Vienna) was an Austro-Hungarian Empire, Austro-Hungarian general who was active in World War I. Biography Pflanzer-Baltin became General of Cavalry from October 1912 a ...
respectively, protected Mackensen's eastern flank. On Mackensen's western flank was the Austro-Hungarian Fourth Army, led by Archduke Joseph Ferdinand. On 24 June, the Russian Tsar
Nicholas II Nicholas II or Nikolai II Alexandrovich Romanov; spelled in pre-revolutionary script. ( 186817 July 1918), known in the Russian Orthodox Church as Saint Nicholas the Passion-Bearer,. was the last Emperor of Russia, King of Congress Pol ...
met with his senior leaders in
Baranovichi Baranavichy ( ; be, Бара́навічы, Łacinka: , ; russian: Бара́новичи; yi, באַראַנאָוויטש; pl, Baranowicze) is a city in the Brest Region of western Belarus, with a population (as of 2019) of 179,000. It is no ...
, where it was agreed to no longer defend the Polish salient. The new Russian line would run from
Riga Riga (; lv, Rīga , liv, Rīgõ) is the capital and largest city of Latvia and is home to 605,802 inhabitants which is a third of Latvia's population. The city lies on the Gulf of Riga at the mouth of the Daugava river where it meets the ...
,
Kovno Kaunas (; ; also see other names) is the second-largest city in Lithuania after Vilnius and an important centre of Lithuanian economic, academic, and cultural life. Kaunas was the largest city and the centre of a county in the Duchy of Traka ...
,
Grodno Grodno (russian: Гродно, pl, Grodno; lt, Gardinas) or Hrodna ( be, Гродна ), is a city in western Belarus. The city is located on the Neman River, 300 km (186 mi) from Minsk, about 15 km (9 mi) from the Polish b ...
,
Brest-Litovsk Brest ( be, Брэст / Берасьце, Bieraście, ; russian: Брест, ; uk, Берестя, Berestia; lt, Brasta; pl, Brześć; yi, בריסק, Brisk), formerly Brest-Litovsk (russian: Брест-Литовск, lit=Lithuanian Br ...
, along the upper Bug, and then along the
Dniester The Dniester, ; rus, Дне́стр, links=1, Dnéstr, ˈdⁿʲestr; ro, Nistru; grc, Τύρᾱς, Tyrās, ; la, Tyrās, la, Danaster, label=none, ) ( ,) is a transboundary river in Eastern Europe. It runs first through Ukraine and t ...
into Romania. The
Third Third or 3rd may refer to: Numbers * 3rd, the ordinal form of the cardinal number 3 * , a fraction of one third * 1⁄60 of a ''second'', or 1⁄3600 of a ''minute'' Places * 3rd Street (disambiguation) * Third Avenue (disambiguation) * Hi ...
and Fourth Armies were also placed under the control of
Mikhail Alekseyev Mikhail Vasilyevich Alekseyev (russian: Михаил Васильевич Алексеев) ( – ) was an Imperial Russian Army general during World War I and the Russian Civil War. Between 1915 and 1917 he served as Tsar Nicholas II's Chi ...
's
Northwest Front Harold Armstead Covington (September 14, 1953 – July 14, 2018) was an American neo-Nazi activist and writer. Covington advocated the creation of an "Aryan homeland" in the Pacific Northwest (known as the Northwest Territorial Imperative), and ...
, consisting of the
Second The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds ea ...
, First, Twelfth, Tenth and Fifth Armies, deployed south to north. Alekseyev then planned a slow withdrawal from the salient. The ''Ober Ost'' attack was to commence on 13 July, followed by Mackensen's advance on 15 July. The strategic Russian railway center of
Włodzimierz Wołyński Volodymyr ( uk, Володи́мир, from 1944 to 2021 Volodymyr-Volynskyi ( uk, Володи́мир-Воли́нський)) is a small city located in Volyn Oblast, in north-western Ukraine. It is the administrative centre of the Volodymyr ...
was an early priority of Mackensen.


Offensive

During the first two days of battle, Gallwitz's Twelfth Army pushed Alexander Litvinov's First Army back and captured 7,000 prisoners. By 17 July, Gallwitz's Twelfth Army and Friedrich von Scholtz's Eighth Army had pushed the Russian First and Twelfth Armies to the
Narew The Narew (; be, Нараў, translit=Naraŭ; or ; Sudovian: ''Naura''; Old German: ''Nare''; uk, Нарва, translit=Narva) is a 499-kilometre (310 mi) river primarily in north-eastern Poland, which is also a tributary of the river Vi ...
. On 14 July, the Austro-Hungarian First Army, redeployed from the south of Woyrsch Corps to the east of Mackensen, advanced towards
Sokal Sokal ( uk, Сокаль, romanized: ''Sokal'') is a city located on the Bug River in Chervonohrad Raion, Lviv Oblast of western Ukraine. It hosts the administration of Sokal urban hromada, one of the hromadas of Ukraine. The population is appro ...
. The First Army was then to form a
bridgehead In military strategy, a bridgehead (or bridge-head) is the strategically important area of ground around the end of a bridge or other place of possible crossing over a body of water which at time of conflict is sought to be defended or taken over ...
across the Bug, defended by the Russian Eighth Army, which they achieved by 18 July, and commenced to move towards Włodzimierz Wołyński. On 15 July, the Bug Army overran Russian defenses, forcing their retreat. On 16 July, Mackensen's Eleventh Army overran the first line of Russian defenses, captured Krasnostaw, and about 6000 prisoners. By 18 July, they had advanced north , and captured 15,000 prisoners. On 17 July, the Woyrsch Corps commenced its attack, and captured
Radom Radom is a city in east-central Poland, located approximately south of the capital, Warsaw. It is situated on the Mleczna River in the Masovian Voivodeship (since 1999), having previously been the seat of a separate Radom Voivodeship (1975 ...
. On 22 July, as the Austro-Hungarian Fourth Army advanced towards
Lublin Lublin is the ninth-largest city in Poland and the second-largest city of historical Lesser Poland. It is the capital and the center of Lublin Voivodeship with a population of 336,339 (December 2021). Lublin is the largest Polish city east of ...
, Alexeyev ordered a retreat towards
Ivangorod Ivangorod ( rus, Иванго́род, p=ɪvɐnˈɡorət; et, Jaanilinn; vot, Jaanilidna) is a town in Kingiseppsky District of Leningrad Oblast, Russia, located on the east bank of the Narva river which flows along the Estonia–Russia int ...
. On 23 July, ''Ober Ost'' was able to establish a bridgehead across the Narew at
Pułtusk Pułtusk (pronounced ) is a town in northeast Poland, by the river Narew. Located north of Warsaw in the Masovian Voivodeship, it had a population of about 19,000 . Known for its historic architecture and Europe's longest paved marketplace ( ...
. At this stage of the battle, a swift breakthrough by the Central Powers became doubtful. In the words of Ludendorff, "The Russian Army was certainly forced to move ack but it escaped. It launched constant determined counterattacks with powerful forces to reorganize and successfully mount prolonged resistance." Max Hoffmann noted, "It seems that the Russians are actually repeating he events of1812 and retreating along the entire front. They are setting fire to hundreds of their own villages, whose inhabitants have been evacuated." As the Russian army retreated, the Chief of the General Staff
Nikolai Yanushkevich Nikolai Nikolaevich Yanushkevich (russian: Никола́й Никола́евич Янушке́вич) – 1918) was a Russian General who served as Chief of Staff of the General Headquarters (Stavka) of the Imperial Russian Army from August 1 ...
, supported by Grand Duke Nicholas, ordered the army to devastate the border territories and expel the "enemy" nations within. The Russian authorities deported 500,000 Jews and 250,000 Germans into the Russian interior. On 11 June, a pogrom began against Germans in Petrograd, with over 500 factories, stores and offices looted and mob violence unleashed against Germans. The Russian military leadership regarded Muslims, Germans and Poles as traitors and spies, while Jews were considered political unreliables. On 29 July, Woyrsch established a bridgehead across the Vistula north of Ivangorod, forcing the Russians to abandon the fortress there. On 31 July, Mackensen captured Lublin, and on 1 August, the Bug Army captured Khelme. Alexeyev then ordered Warsaw to be abandoned, and on 5 August, Prince Leopold's Ninth Army marched into the city. On 17 August, the German Tenth Army captured
Kovno Kaunas (; ; also see other names) is the second-largest city in Lithuania after Vilnius and an important centre of Lithuanian economic, academic, and cultural life. Kaunas was the largest city and the centre of a county in the Duchy of Traka ...
and the Kaunas Fortress. The Novogeorgievsk Fortress was encircled by the Germans on 10 August, and
Hans Hartwig von Beseler Hans Hartwig von Beseler (27 April 1850 – 20 December 1921) was a German colonel general. Biography Beseler was born in Greifswald, Pomerania. His father Georg Beseler, was a law professor at the University of Greifswald. He entered the Pr ...
's siege guns forced its surrender on 20 August. The Osowiec Fortress was also eventually abandoned by the Russians, followed by a German chlorine gas attack.
Kovel Kovel (, ; pl, Kowel; yi, קאוולע / קאוולי ) is a city in Volyn Oblast (province), in northwestern Ukraine. It serves as the administrative center of Kovel Raion (district). Population: Kovel gives its name to one of the oldest ru ...
was abandoned by the Russians on 21 August, and ''
Stavka The ''Stavka'' (Russian and Ukrainian: Ставка) is a name of the high command of the armed forces formerly in the Russian Empire, Soviet Union and currently in Ukraine. In Imperial Russia ''Stavka'' referred to the administrative staff ...
'' abandoned Baranovichi for Mogilev. Mackensen's Eleventh Army, and Linsingen's Bug Army, continued their northerly advance towards Brest-Litovsk, occupying the citadel on 26 August. Otto von Below's
Army of the Niemen The Army of the Niemen (german: Njemen-Armee) was an army level command of the German Army in World War I. ''Armee-Abteilung'' Lauenstein The German offensive in Courland was intended to be a diversion while the main effort was made further ...
advanced into southern Latvia, while Scholtz's Tenth Army advanced towards
Vilna Vilnius ( , ; see also other names) is the capital and largest city of Lithuania, with a population of 592,389 (according to the state register) or 625,107 (according to the municipality of Vilnius). The population of Vilnius's functional urba ...
, which was abandoned by the Russians on 17 September.


Aftermath

According to
Prit Buttar Prit Buttar is a British general practitioner and writer. He has written ten history books on the eastern fronts of World War I and World War II, and two novels. Dr. Buttar was Senior Partner at Abingdon Surgery until he moved to Scotland in la ...
, "...as far as Falkenhayn was concerned, he had achieved all that he could expect to achieve on the Eastern Front. Russia was clearly not going to accept a separate peace, and the complete destruction of the Russian Army had never been his intention. With so much territory gained and so much damage done to the Russians, it was highly likely that there would be no threat from the east for the foreseeable future." The tsar assumed command of the military, dismissing Grand Duke Nikolai, and
Nikolai Yanushkevich Nikolai Nikolaevich Yanushkevich (russian: Никола́й Никола́евич Янушке́вич) – 1918) was a Russian General who served as Chief of Staff of the General Headquarters (Stavka) of the Imperial Russian Army from August 1 ...
.


Casualties and losses

During the summer offensive, the troops of the Central Powers inflicted very heavy casualties on the Imperial Russian Army - in 45 days - up to 1,006,000 men. Of course, this was somewhat less than the Russian casualties in the previous Gorlice campaign (1,243,400 men in 75 days), but on average, the casualties per day were higher - 22,300 men against 16,600. Such dynamics was affected, before of all, the fall of the Novogeorgievsk fortress and the capture by the Germans of its numerous garrison. The armies of the Central Powers suffered less casualties in July-August than in May-June (358,600 men against 535,300), but the daily average casualties also increased (from 7,000 to almost 8,000 men). At the same time, if in the Gorlice campaign the most severe casualties of the Central Powers were the casualties of the Austro-Hungarian troops (2.5 times more than the German ones), then in the general offensive the German troops already lost 2 times more men than their ally. Such dynamics allows us to conclude that the casualties of the armies of the
Dual Monarchy Dual monarchy occurs when two separate kingdoms are ruled by the same monarch, follow the same foreign policy, exist in a customs union with each other, and have a combined military but are otherwise self-governing. The term is typically use ...
in the Gorlice campaign affected their subsequent activity - namely, on the front south of the Bug. Also for the German Great General Staff, high casualties became one of the factors for refusing further offensive actions against the Russian Empire and switching to defense. For the Russian side, the scale of the casualties suffered greatly affected the further planning of military operations, forcing them to abandon not only the transition to the offensive, but also the protracted battle in their positions. Particularly painful was the increase in the number of prisoners, despite the fact that the enemy constantly announced the size of the trophies. In total, the Central Powers announced the capture from mid-July to September 1 of 511,679 prisoners (of which 18 were generals and 2,923 officers), 1,076 machine guns and 3,205 guns (of which 2,941 were in fortresses). The number of prisoners declared to the
International Committee of the Red Cross The International Committee of the Red Cross (ICRC; french: Comité international de la Croix-Rouge) is a humanitarian organization which is based in Geneva, Switzerland, and it is also a three-time Nobel Prize Laureate. State parties (signato ...
exceeds the number of missing, probably due to the prisoners taken in the last days of August, when the Austro-Hungarian troops began to attack
Volhynia Volhynia (also spelled Volynia) ( ; uk, Воли́нь, Volyn' pl, Wołyń, russian: Волы́нь, Volýnʹ, ), is a historic region in Central and Eastern Europe, between south-eastern Poland, south-western Belarus, and western Ukraine. The ...
and the boom beyond
Grodno Grodno (russian: Гродно, pl, Grodno; lt, Gardinas) or Hrodna ( be, Гродна ), is a city in western Belarus. The city is located on the Neman River, 300 km (186 mi) from Minsk, about 15 km (9 mi) from the Polish b ...
and
Vilna Vilnius ( , ; see also other names) is the capital and largest city of Lithuania, with a population of 592,389 (according to the state register) or 625,107 (according to the municipality of Vilnius). The population of Vilnius's functional urba ...
, as well as a result of errors in calculations and underestimation of the missing among the rear units and services of
Kovno Kaunas (; ; also see other names) is the second-largest city in Lithuania after Vilnius and an important centre of Lithuanian economic, academic, and cultural life. Kaunas was the largest city and the centre of a county in the Duchy of Traka ...
,
Ivangorod Ivangorod ( rus, Иванго́род, p=ɪvɐnˈɡorət; et, Jaanilinn; vot, Jaanilidna) is a town in Kingiseppsky District of Leningrad Oblast, Russia, located on the east bank of the Narva river which flows along the Estonia–Russia int ...
,
Łomża Łomża (), in English known as Lomza, is a city in north-eastern Poland, approximately 150 kilometers (90 miles) to the north-east of Warsaw and west of Białystok. It is situated alongside the Narew river as part of the Podlaskie Voivodeship ...
and Osowiec. However, in this case, there is a tendency when almost all the missing are in captivity. The increase in the number of prisoners, even in comparison with the Gorlice campaign, was primarily due to the surrender of the Novogeorgievsk garrison (almost 90,000 men). Despite the threats of repressive measures against both the so-called “voluntarily surrendered” and the families of prisoners (deprivation of government rations), the distribution of “stories” by order of the alleged mass destruction of those captured by the enemy, the proportion of missing remained large and outnumbered the number of wounded. The Chief of the staff of the Southwestern Front (whose troops in July-August suffered casualties as prisoners to a much lesser extent), General of Artillery N. Ivanov, on August 10, ordered all commanding persons to conduct thorough investigations of "such shameful phenomena for the Russian warrior" when " a very large, unprecedented in the Russian army, the number of military ranks missing during marches and battles, a significant and even most of which either disperse, making escapes, or surrender to the enemy". Ivanov emphasized: “Senior commanders must show special care and forethought in preventing these phenomena that shame our army”. Along with objective factors - the severity of the battles, when shelters and trenches were destroyed during prolonged shelling, burying soldiers under them, night crossings in a state of extreme fatigue, continuous retreat - subjective factors also influenced the increase in the number of missing persons, namely the weakness of officers and non-commissioned officers, poor training of replenishment. A glaring fact of the fall in the level of training of young soldiers was the incident with the 12th company of the 164th reserve battalion, sent on July 17, 1915 to replenish the 61st Infantry Division. On July 20, on the 4th day of the march, the company fled; out of 250 men, only six came to their destination. The number of wounded in the fingers continued to grow, which caused repeated criticism from the commanders, threats of reprisals and even condemnation by courts-martial to death of those convicted of self-mutilation. After the beginning of the July fighting, the chief of staff of the
2nd Siberian Army Corps The 2nd Siberian Army Corps was an Army corps in the Imperial Russian Army. Composition 1905: *6th Siberian Rifle Division * 8th Siberian Rifle Division 1914: * 4th Siberian Rifle Division * 5th Siberian Rifle Division Part of *1st Manchurian Arm ...
ordered not to evacuate the wounded in the fingers and hands, but to bring them to justice; regimental commanders were required to submit monthly reports on the number of lower ranks with such wounds. During the repulse of the summer offensive of the Central Powers, Russian troops captured 281 officers and 20,353 soldiers, as well as 25 machine guns. Given this number, it can be assumed that on the Central Powers's side the death toll could rise to 101,064 men (71,523 on the German side and 29,541 on the Austro-Hungarian side), which exceeds the number of deaths on the Russian side. Such serious damage clearly affected the position of the Chief of the German Great General Staff, E. von Falkenhayn, who insisted on the immediate curtailment of the offensive and the transition to defense in the achieved advantageous positions. But in general, the casualties of the Imperial Russian Army turned out to be almost three times higher than that of the enemy, mainly due to the prisoners (a ratio of more than 20:1).С.Г. Нелипович, 2022, p. 702


See also

* Bug-Narew Offensive * Vistula-Bug offensive * Siege of Novogeorgievsk * Riga-Schaulen offensive *
Kovno Kaunas (; ; also see other names) is the second-largest city in Lithuania after Vilnius and an important centre of Lithuanian economic, academic, and cultural life. Kaunas was the largest city and the centre of a county in the Duchy of Traka ...
* Zolota Lypa-Dniestr battle


References


Bibliography

* *


Further reading

* * Norman Stone, ''The Eastern Front 1914-17'' (London, 1975) pp. 165–193 * Stanley Washburn
Victory in defeat; the agony of Warsaw and the Russian retreat
* Stanley Washburn
The Russian campaign, April to August, 1915
{{coord missing, Russia Conflicts in 1915 Battles of the Eastern Front (World War I) Battles of World War I involving Germany Battles of World War I involving Russia 1915 in the Russian Empire July 1915 events August 1915 events September 1915 events Ukraine in World War I World War I crimes by the Russian Empire 1915 disasters in the Russian Empire