Marching song of the 1st Arkansas (black) regiment during the American Civil War (lyrics attributed to Capt Lindley Miller, a white officer):

Oh, we're the bully soldiers of the "First of Arkansas"
We are fighting for the union, we are fighting for the law
We can hit a Rebel further than a white man ever saw
As we go marching on.

See there above the center where the flag is waving bright
We are going out of slavery; we're bound for freedom's light
We mean to show Jeff Davis how the Africans can fight
As we go marching on!

(there are more verses...)