Anti-terrorist Operation Zone

This article is about a territory where the War in Donbas (2014–2022) was taking place. For Russian military invasion sequence, see Russo-Ukrainian War. For other uses of "ATO", see ATO (disambiguation).

Anti-Terrorist Operation Zone (Ukrainian: Зона проведення антитерористичної операції, romanized: Zona provedennya antyterorystychnoyi operatsiyi), or ATO zone (Ukrainian: Зона АТО, romanized: Zona ATO), was a term used by the media, public, the government of Ukraine, and the OSCE and other foreign institutions to identify Ukrainian territory of the Donetsk and Luhansk regions (oblasts) under the control of Russian military forces and pro-Russian separatists. As the 2014 pro-Russian unrest in Ukraine escalated with the arrival of armed militias, the Ukrainian government declared the start of an "Anti-Terrorist Operation" (ATO), marking the beginning of the War in Donbas. 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'.


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