The Internationale is so good, definitely my favourite socialist song. It's not even like my favourite musically, but it just hits different somehow, it feels more unifying. Also the fact it's been translated into pretty much every language in existence and had different local spins put on it is great
The greatest version of all time: 1941 in Red Square, red army soldiers parading past Stalin heading directly to join the fighting on the outskirts of Moscow. Everyone's using the Internationale to get pumped