Ukraine
That looks like an AZOV formation, they do like their square mass military parade formations when they're being mystical minded Nazis. In this case there were too few there to make a square, so they formed two of the sides of a hollow square.
They are on the right side, but they actually are are fascist nationalist azzholes.
I do hope the war goes well for Ukraine, but not so well for them. It would be a good thing if that weird group went missing in history after this war somehow.