Soviet patriotic songs are mostly encouraging and energetic. Even maybe... you know... magic sometimes.
It's "И вновь продолжается бой" / "The battle is going on again" song by Aleksandra Pakhmutova and Nikolai Dobronravov (performed at 1976 by Leonid Smetannikov and Moscow Youth and Students Chorus).
If you understand Russian language, just don't pay attention to mentions of Lenin and October, I don't promote any ideology here.
Lyrics (look below for video with English translation):
Song with english lyrics on screen (can't comment anything on translation's quality):