Not sure if the guys in the striped shirts are military, paramilitary thugs, or just yobs wearing surplus.
A telnyashka (Russian: тельня́шка, IPA: [tʲɪlʲˈnʲæʂkə]) is a dark
color and white striped, sleeveless or not, undershirt, which is an
iconic uniform of the Russian Navy, the Russian Airborne Troops (VDV)
and the Russian Naval Infantry (marines), initially by Soviet
predecessors of these troops. It has been a symbol of great military
pride for those who wear it gradually becoming a broader symbol of
masculinity and self-confidence. (wikipedia)