Lyrics in English courtesy of Google Translate (with a few slight changes by me), the song’s name is “Under the Waving Shadows”

Under the waving shadows
our flags fluttering in the wind
We follow the voice of the ancestors
We are your faithful descendants

We carry the eternal fire
that burns brightly in our hearts
And the only guiding light is just
our Führer, the leader of this world

We protect the sacred heritage,
our gods and our nation
And we never forget all the fighters of
the liberating revolution

Whoever the day comes, for the final sacrifice
And sad fate appears
We become one with the earth,
Immortals for eternity