A Sniper's War(2018)

A Sniper’s War is a story of a sniper, whose anti-US views led him to join the pro-Russian rebels in the ongoing Ukrainian conflict—a primary source of tension between the United States and Russia. When social media becomes a communication platform to schedule sniper duels, Deki’s rival threatens to kill him. The New York-based filmmaker, Olya Schechter, obtains unprecedented access to military bases and front line battles to paint an intimate portrait of the complex and fascinating nature of a man walking the tightrope that often comes to the morality of war: is Deki a solder or a killer?

Official site