Joint Forces Operation (Ukraine)
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. 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'.