Ukrainian defensive line was a Russian heavily fortified defensive line on the territory of modern Ukraine built between 1731–1764 on the lands of the

Zaporozhian Sich The Zaporozhian Sich (, , ; also ) was a semi-autonomous polity and proto-state of Zaporozhian Cossacks that existed between the 16th to 18th centuries, for the latter part of that period as an autonomous stratocratic state within the Cossa ...

and the

Cossack Hetmanate The Cossack Hetmanate (; Cossack Hetmanate#Name, see other names), officially the Zaporozhian Host (; ), was a Ukrainian Cossacks, Cossack state. Its territory was located mostly in central Ukraine, as well as in parts of Belarus and southwest ...

. Built by imperial Russia, it strengthened the defense of the southern borders from

Tatar Tatar may refer to: Peoples * Tatars, an umbrella term for different Turkic ethnic groups bearing the name "Tatar" * Volga Tatars, a people from the Volga-Ural region of western Russia * Crimean Tatars, a people from the Crimea peninsula by the B ...

incursions and established military bases in approximation to the

Crimea Crimea ( ) is a peninsula in Eastern Europe, on the northern coast of the Black Sea, almost entirely surrounded by the Black Sea and the smaller Sea of Azov. The Isthmus of Perekop connects the peninsula to Kherson Oblast in mainland Ukrain ...

. 285 kilometers in length, it comprised 16 newly-constructed forts and 4 old forts repaired. The first stage was built from 1731–40 and subsequent construction began in the 1740s.

History of construction

Since the late 1720s, the

Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...

began to actively prepare for war with the

Ottoman Empire The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...

for the return of

Azov Azov (, ), previously known as Azak ( Turki/ Kypchak: ), is a town in Rostov Oblast, Russia, situated on the Don River just from the Sea of Azov, which derives its name from the town. The population is History Early settlements in the vici ...

and Northern Azov Sea Region. The Ukrainian line was built to prevent the

incursion into the Poltava territory of the Hetmanate and the Kharkov territory of Sloboda Ukraine. The line proved to be of limited success given the distance between the fortresses and that the Crimean Tatars excelled in asymmetrical warfare, by raiding through gaps in the Russian defense lines.Brian Davies. "Empire and Military Revolution in Eastern Europe: Russia's Turkish Wars in the Eighteenth Century. Continuum International Publishing Group", 2011., p. 205 The bulk of the work on the construction was done by

Ukrainian Cossacks The Zaporozhian Cossacks (in Latin ''Cossacorum Zaporoviensis''), also known as the Zaporozhian Cossack Army or the Zaporozhian Host (), were Cossacks who lived beyond (that is, downstream from) the Dnieper Rapids. Along with Registered Cossa ...

and

peasants A peasant is a pre-industrial agricultural laborer or a farmer A farmer is a person engaged in agriculture, raising living organisms for food or raw materials. The term usually applies to people who do some combination of raising f ...

in 1731–1732. Every year 20 thousand Cossacks and 10 thousand peasants of Hetmanate worked on the line, who were obliged to work with their inventory and supplies, every 10th with an ox and the Cossacks with their weapons. Thousands of

Ukrainians Ukrainians (, ) are an East Slavs, East Slavic ethnic group native to Ukraine. Their native tongue is Ukrainian language, Ukrainian, and the majority adhere to Eastern Orthodox Church, Eastern Orthodoxy, forming the List of contemporary eth ...

lost their lives in the construction of the line. After signing the

Treaty of Belgrade The Treaty of Belgrade, also known as the Belgrade Peace, was a peace treaty between the Habsburg Monarchy and Ottoman Empire, that was signed on September 18, 1739 in Belgrade (modern Serbia), thus ending the Austro–Turkish War (1737–1739) ...

in 1739 and the transfer of the Russian-Turkish border from the territory between the

Samara Samara, formerly known as Kuybyshev (1935–1991), is the largest city and administrative centre of Samara Oblast in Russia. The city is located at the confluence of the Volga and the Samara (Volga), Samara rivers, with a population of over 1.14 ...

and

Oril The Oril () is a river in Ukraine, a left tributary of the river Dnieper. It is long and its basin area is .� ...

rivers on the

Azov Sea The Sea of Azov is an inland shelf sea in Eastern Europe connected to the Black Sea by the narrow (about ) Strait of Kerch, and sometimes regarded as a northern extension of the Black Sea. The sea is bounded by Russia on the east, and by Ukr ...

, work on the line was terminated, and with the construction of the Dnieper line in 1770–1783, the Ukrainian line lost its military defensive value.

Structure of the Line

The line ran from the

Oril The Oril () is a river in Ukraine, a left tributary of the river Dnieper. It is long and its basin area is .� ...

river to the Siverskyi Donets River. The Ukrainian line consisted of 16

fort A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from La ...

s and 49

redoubt A redoubt (historically redout) is a Fortification, fort or fort system usually consisting of an enclosed defensive emplacement outside a larger fort, usually relying on Earthworks (engineering), earthworks, although some are constructed of ston ...

Locations

For defense there were 20 regiments of land militia, (14

cavalry Historically, cavalry (from the French word ''cavalerie'', itself derived from ''cheval'' meaning "horse") are groups of soldiers or warriors who Horses in warfare, fight mounted on horseback. Until the 20th century, cavalry were the most mob ...

regiment A regiment is a military unit. Its role and size varies markedly, depending on the country, military service, service, or administrative corps, specialisation. In Middle Ages, Medieval Europe, the term "regiment" denoted any large body of l ...

s, and six

infantry Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadl ...

regiments) with about 22 000; it had 180 artillery guns and 39

mortars Mortar may refer to: * Mortar (weapon), an indirect-fire infantry weapon * Mortar (masonry), a material used to fill the gaps between blocks and bind them together * Mortar and pestle, a tool pair used to crush or grind * Mortar, Bihar, a village i ...

. In 1740 there were 18 forts and 140 redoubts. Bilevska castle was the center of the line. Until 1764, a land militia office was located there.

References

{{Reflist 1730s in Ukraine 1740s in Ukraine 1750s in Ukraine 1760s in Ukraine Forts in Ukraine History of Dnipropetrovsk Oblast History of Kharkiv Oblast History of Poltava Oblast Military of the Russian Empire 18th century in the Zaporozhian Host Archaeological sites in Ukraine