LUHANSK, UKRAINE - JULY 12: A communist flag hangs on a wall inside a rebel base as Pro-Russian rebels fighters of the Prezrak ( Ghost ) batallion fighting on the side of self-proclaimed Lugansk People's Republic hold their positions on the northern frontline July 12, 2015 in Luhansk, Ukraine. Despite a ceasefire four months ago there has been multiple accusations of acts of provocation. More than 6,500 people, most of them civilians, have been killed in the conflict, which began in April 2014.  (Photo by Pierre Crom/Getty Images)