Uh, and there are also "Echelon's Song" ( this is written in 33 ) , "Let's March Bravely Comrades" & "Worker's Marseillaise"

You can consider adding 2 soundtracks of very popular soviet films, "Песня красноармейца" from the film The Kirk and "Ваше благородие" from the film White Sun of the Desert. In addition, "Moscow in May", "Hymn of the Bolshevik Party / Life has became better" (they both share the same melody), "March of The Enthusiasts", "Song of the Dzerzhinskyites", "Party of Lenin", "You fell victim", "The Revolution Has A Beginning", "Konarmeiskaya", "Song of Schors" are all great songs which came into my mind.

@molotov245
2. Already added as number 15.
5. Already added as number 28.
1, 3, 4, and 6 might be added later. But I'm not currently planning to.

We Swear, Party, To You (Red Navy Choir)
Internationale
Marshal Zhukov and Victory
Cossack's Song
The Battle is Going Again
Left March