Excellent Short Film About the Separatist Fighters of Donbas by Russell 'Texas' Bentley (Video)
This is very well made.
A monastery near the Donetsk airport was strategically important to hold for the fighter, so a bitter shooting battle erupted over it, taking many lives on both sides. The monastery was badly damaged in the process.
Bentley is an American socialist volunteering in the Donbas as a fighter. He has a good YouTube channel and website. He writes very well.