American Blood (1916), directed by Al Bundy
Robert Krust is a soldier in a regiment of the US army. He serves his time in the middle of the civil war. One time, his regiment tries to attack an enemy's fortress, but the attack fails, and almost all soliders of his regiment are either dead or captured. Miracously, Krust survives and makes it back to his quarter. There, his supreme officers tell him, that he'll be drafted to another army, and they can't do much for his imprisoned colleagues. But Krust disobeys his superiors order and tries to free them on his own.
Krust and the Confederate forces have some battles in the wide lands of North and South Carolina, but Krust gets assistance by slaves who resist their masters. So, Krust and his African helpers go to the P.o.W camp, and free Krust's people. After an epic shootout between Krust's men and Confederate soldiers, Krust returns home.