The flag of the Donetsk Republic since 2014. Donetsk Republic is a pro-Russian separatist organization and a political party operating in Donetsk, Ukraine. The flag was also used as state flag between April and June 2014.
Own work. Adaptation of these works, uploaded by Снова дверь прикрыл кондуктор and SouthWillRiseAgain respectively.
MrPenguin20