
Anti-Terrorist Operation Zone (), or ATO zone (), was a term used by the media, public, the government of
Ukraine
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
, and the
OSCE
The Organization for Security and Co-operation in Europe (OSCE) is a regional security-oriented intergovernmental organization comprising member states in Europe, North America, and Asia. Its mandate includes issues such as arms control, the pr ...
and other foreign institutions to identify Ukrainian territory of the
Donetsk
Donetsk ( , ; ; ), formerly known as Aleksandrovka, Yuzivka (or Hughesovka), Stalin, and Stalino, is an industrial city in eastern Ukraine located on the Kalmius River in Donetsk Oblast, which is currently occupied by Russia as the capita ...
and
Luhansk
Luhansk (, ; , ), also known as Lugansk (, ; , ), is a city in the Donbas in eastern Ukraine. As of 2022, the population was estimated to be making Luhansk the Cities in Ukraine, 12th-largest city in Ukraine.
Luhansk served as the administra ...
regions (
oblast
An oblast ( or ) is a type of administrative division in Bulgaria and several post-Soviet states, including Belarus, Russia and Ukraine. Historically, it was used in the Russian Empire and the Soviet Union. The term ''oblast'' is often translated i ...
s) under the control of Russian military forces and pro-Russian separatists. A significant part of ATO (JFO, starting 2018) zone was considered
temporarily occupied territory of Ukraine. In Minsk II protocols of 2015 it was referred to as 'certain areas of Donetsk and Luhansk regions'.
History
On 20 February 2018,
Ukrainian President
The president of Ukraine (, ) is the head of state of Ukraine. The president represents the nation in international relations, administers the foreign political activity of the state, conducts negotiations and concludes international treaties. ...
Petro Poroshenko
Petro Oleksiiovych Poroshenko (born 26 September 1965) is a Ukraine, Ukrainian politician and Oligarchy, oligarch who served as the fifth president of Ukraine from 2014 to 2019. He served as the Minister of Foreign Affairs (Ukraine), Minister ...
changed the status of the ATO zone from an anti-terrorist operation to "taking measures to ensure national security and defense, and repulsing and deterring the armed aggression of the Russian Federation in Donetsk and Luhansk oblasts".
This allowed the
Ukrainian military to take charge of the zones instead of the Ukrainian security service
SBU. As such, the ATO was renamed to JFO zone (Joint Forces Operation ().
Following the
Russian invasion of Ukraine
On 24 February 2022, , starting the largest and deadliest war in Europe since World War II, in a major escalation of the Russo-Ukrainian War, conflict between the two countries which began in 2014. The fighting has caused hundreds of thou ...
, out-of-service ATO
veterans
A veteran () is a person who has significant experience (and is usually adept and esteemed) and expertise in an job, occupation or Craft, field.
A military veteran is a person who is no longer serving in the military, armed forces.
A topic o ...
have repeatedly been the target of Russian forces, for example of the
Redut PMC. According to captured fighters, with this they wanted to decrease the risk of them joining the defence of Ukraine. For this purpose, veterans were interrogated and tortured in order to find more, after which many were killed. Two
Redut PMC fighters were convicted for committing such war crimes.
Military administrative division
The official borders of the ATO zone were defined with a list of localities and their geographical coordinates, approved in November 2014 by Ukraine's parliament, the
Verkhovna Rada
The Verkhovna Rada ( ; VR), officially the Verkhovna Rada of Ukraine, is the unicameralism, unicameral parliament of Ukraine. It consists of 450 Deputy (legislator), deputies presided over by a speaker. The Verkhovna Rada meets in the Verkhovn ...
.
The zone is conditionally divided into five sectors A, B, C, D, and M.
* Sector A – eastern and central parts of
Luhansk Oblast
Luhansk Oblast (; ), also referred to as Luhanshchyna (), is the easternmost Administrative divisions of Ukraine, oblast (province) of Ukraine. Its administrative center is the city of Luhansk. The oblast was established in 1938 and bore the n ...
* Sector B – central parts of
Donetsk Oblast
Donetsk Oblast, also referred to as Donechchyna (, ), is an Oblasts of Ukraine, oblast in eastern Ukraine. It is Ukraine's most populous province, with around 4.1 million residents. Its capital city, administrative centre is Donetsk, though d ...
including
Donetsk
Donetsk ( , ; ; ), formerly known as Aleksandrovka, Yuzivka (or Hughesovka), Stalin, and Stalino, is an industrial city in eastern Ukraine located on the Kalmius River in Donetsk Oblast, which is currently occupied by Russia as the capita ...
and
Makiivka
* Sector C – northern parts of Donetsk Oblast (cities
Bakhmut and
Debaltseve), and western parts of Luhansk Oblast
* Sector D – southern parts of Luhansk Oblast and eastern parts of Donetsk Oblast (after the 2014 Russian invasion on August 24, all Ukrainian forces were withdrawn)
* Sector M – southern parts of Donetsk Oblast (around
Mariupol
Mariupol is a city in Donetsk Oblast, Ukraine. It is situated on the northern coast (Pryazovia) of the Sea of Azov, at the mouth of the Kalmius, Kalmius River. Prior to the Russian invasion of Ukraine, it was the tenth-largest city in the coun ...
, hence the sector's identification)
Influence in culture and society

Since 28 December 2015, the song "Brattia Ukraintsi" (Brothers Ukrainians) is the official anthem of ATO.
During the
War in Donbas
The war in Donbas, or the Donbas war, was a phase of the Russo-Ukrainian War in the eastern Donbas region of Ukraine. The war Timeline of the war in Donbas (2014), began in April 2014, when Russian separatist forces in Ukraine, Russian para ...
between the
Ukrainian government forces and
pro-Russian separatists in the
Donbas
The Donbas (, ; ) or Donbass ( ) is a historical, cultural, and economic region in eastern Ukraine. The majority of the Donbas is occupied by Russia as a result of the Russo-Ukrainian War.
The word ''Donbas'' is a portmanteau formed fr ...
region of
Ukraine
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
that began in April 2014, many international organisations and states noted a deteriorating humanitarian situation in the conflict zone.
A May 2014 report by the United Nations said there had been an "alarming deterioration" in human rights in territory held by Russian separatists affiliated with the
Donetsk People's Republic
The Donetsk People's Republic (DPR; , ) is Russian-occupied territories of Ukraine, occupied territory in Ukraine that the Russian Federation has claimed to annex and declared as a Republics of Russia, republic of Russia, comprising parts o ...
(DPR) and
Luhansk People's Republic
The Luhansk People's Republic (LPR; , ) is a disputed territory administered as a republic of Russia in the occupied parts of eastern Ukraine's Luhansk Oblast, with its capital in Luhansk. The LPR was proclaimed by Russian-backed paramilitar ...
(LPR). The
UN Human Rights Monitoring Mission in Ukraine (HRMMU) reported growing lawlessness in the region, documenting cases of targeted killings, torture, and abduction.
HRMMU also reported threats against, attacks on, and abductions of journalists and international observers, as well as the beatings and attacks on supporters of Ukrainian unity.
A report by
Human Rights Watch
Human Rights Watch (HRW) is an international non-governmental organization that conducts research and advocacy on human rights. Headquartered in New York City, the group investigates and reports on issues including War crime, war crimes, crim ...
said "Anti-Kiev forces in eastern Ukraine are abducting, attacking, and harassing people they suspect of supporting the Ukrainian government or consider undesirable...anti-Kiev insurgents are using beatings and kidnappings to send the message that anyone who doesn't support them had better shut up or leave".
Non-governmental organisations, such as
Amnesty International
Amnesty International (also referred to as Amnesty or AI) is an international non-governmental organization focused on human rights, with its headquarters in the United Kingdom. The organization says that it has more than ten million members a ...
, also raised concerns about the behaviour of some Ukrainian
volunteer battalions. Amnesty International said that they often acted like "renegade gangs", and were implicated in torture, abductions, and summary executions.
In a report from
HRMMU, May 2014,
Ivan Šimonović
Ivan Šimonović (; born 2 May 1959) is a Croatian diplomat, politician and law scholar. In October 2008 he was appointed Justice Minister of Croatia. On 3 May 2010, Šimonović was appointed UN Assistant Secretary-General for Human Rights. As ...
, UN Assistant Secretary General for Human Rights, wrote about illegal detention, abduction and intimidation of election officials in the self-proclaimed pro-Russian republics, and called for urgent action to prevent a
Balkans-style war. He also warned of a humanitarian crisis due to a failure of social services in the region, and an exodus of people from affected areas. In October 2015, the DPR and LPR banned non-governmental organisations such as
Doctors Without Borders
Doctor, Doctors, The Doctor or The Doctors may refer to:
Titles and occupations
* Physician, a medical practitioner
* Doctor (title), an academic title for the holder of a doctoral-level degree
** Doctorate
** List of doctoral degrees awarded ...
and
World Food Programme
The World Food Programme (WFP) is an international organization within the United Nations that provides food assistance worldwide. It is the world's largest humanitarian organization and the leading provider of school meals. Founded in 1961 ...
from the territory that they control. A report released on 3 March 2016 by the
(OHCHR) said that people that lived in separatist-controlled areas were experiencing "complete absence of rule of law, reports of arbitrary detention, torture and incommunicado detention, and no access to real redress mechanisms". In addition, the report noted "allegations of violations perpetrated with impunity by Ukrainian law enforcement officials—mainly elements of the
Security Service of Ukraine (SBU)—including enforced disappearances, arbitrary and incommunicado detention, and torture and ill-treatment".
According to the
United Nations Children's Fund
UNICEF ( ), originally the United Nations International Children's Emergency Fund, officially United Nations Children's Fund since 1953, is an agency of the United Nations responsible for providing humanitarian and developmental aid to childre ...
(UNICEF), "The results of a psychosocial assessment of children in
Donetsk Oblast
Donetsk Oblast, also referred to as Donechchyna (, ), is an Oblasts of Ukraine, oblast in eastern Ukraine. It is Ukraine's most populous province, with around 4.1 million residents. Its capital city, administrative centre is Donetsk, though d ...
in Eastern Ukraine are deeply troubling ... and indicate that about half of all children aged 7–18 have been directly exposed to adverse or threatening events during the current crisis." OSCE monitors spoke to refugees from Donetsk city in Zaporizhia. They said that men were "often not allowed" to leave the city, but were instead "forcibly enrolled in 'armed forces' of the so-called 'Donetsk People's Republic' or obliged to dig trenches".
By June 2015, the conflict had created 1.3 million
internally displaced people
An internally displaced person (IDP) is someone who is forced to leave their home but who remains within their country's borders. They are often referred to as refugees, although they do not fall within the legal definitions of a refugee.
I ...
(IDPs). According to the OHCHR, this number had grown to 1.6 million people by early March 2016. As of December 2022, the total number of IDPs has increased to 5.9 Million following the
Russian invasion.
Casualties

A report by the OHCHR released on 28 July 2014 said that based on "conservative estimates", at least 1,129 civilians had been killed since mid-April during the fighting, and that at least 3,442 had been wounded.
Another OHCHR report, released on 20 November, estimated that the overall number of people killed in the conflict had risen to 4,317, and that at least 9,921 had been wounded.
Amidst a large-scale escalation in fighting during January and February 2015, the number of casualties greatly increased. According to another OHCHR report based on Ukrainian government sources, 843 people were killed in Donbas from 13 January to 15 February. 359 of these were civilians. 3,410 people were injured during the same period, of which 916 were civilians. By 15 February 2015, 5,665 people had been killed since the start of the war in mid-April 2014, whilst 13,961 had been injured. According to the report, these numbers were "very conservative", and based only on "available data". The report went on to say that "the actual number of casualties is likely to be far higher since military and civilian casualties remain under-reported". On 19 February 2016,
UNICEF
UNICEF ( ), originally the United Nations International Children's Emergency Fund, officially United Nations Children's Fund since 1953, is an agency of the United Nations responsible for providing Humanitarianism, humanitarian and Development a ...
stated that in 2015 more than 20 children were killed and over 40 were injured.
Land mine
A land mine, or landmine, is an explosive weapon often concealed under or camouflaged on the ground, and designed to destroy or disable enemy targets as they pass over or near it. Land mines are divided into two types: anti-tank mines, wh ...
s laid during the conflict have also taken civilian victims.
The
has stated it had cleared Donbas of more than 44,000 mines by early December 2015.
It was currently unclear how many unexploded devices remained.
According to UNICEF, in 2015, 28 children had been casualties due to mines and unexploded ordnance.
According to a United Nations early March 2016 report, over 3 million people lived in the ATO zone. 2.7 million of them lived in the areas controlled by separatist forces, while 200,000 people resided in the proximity to the contact line.
Further reading
* Surzhenko, M.
ATO. Stories from East to West (АТО. Історії зі Сходу на Захід)'. "DISCURSUS" at
Google Books
Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) is a service from Google that searches the full text of books and magazines that Google has scanned, converted to text using optical charac ...
. Brusturiv 2014
* Sakwa, R.
Frontline Ukraine: Crisis in the Borderlands'. "I.B.Tauris" by
Google Books
Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) is a service from Google that searches the full text of books and magazines that Google has scanned, converted to text using optical charac ...
. 2014
Notes
References
External links
Official informational portalof the
National Security and Defense Council of Ukraine
The National Security and Defense Council of Ukraine, ( NSDCU; , ''RNBOU'') or RNBO, is the coordinating state body of the executive power under the President of Ukraine on issues of national security and defense.
It is a state agency tasked wi ...
ATO zone newsfrom
Segodnya
''Segodnya'' ( rus, Сегодня, p=sʲɪˈvodʲnʲə, t=Today, a=Ru-сегодня.ogg) was a Russian language, Russian-language Ukrainian tabloid newspaper founded in 1997. The newspaper ceased printing in 2019.
Affiliations
While run from ...
ATO zone (documentary series)at 24 TV channel (Ukraine)
ATO zone newsfrom
Korrespondent.net
The ''Korrespondent.net'' ( ; ; literally: ''Correspondent'') is an online newspaper in Ukraine launched in 2000. It is a sister project to the ''Korrespondent'' printed weekly magazine also containing the latter's reduced free online version. ''K ...
ATO zonea
Новини України , Цензор.НЕТ – останні новини дня , Свіжі головні новини України та світу
{{Coord, 48.63 , 37.33 , display=title
Administrative divisions of Ukraine
War in Donbas
Donbas
Donetsk Oblast in the Russo-Ukrainian War
Luhansk Oblast in the Russo-Ukrainian War
Counterterrorist organizations