"Galvanized Yankees" vs. Indians vs. Confederates vs. Union

Confederates vs. Indians vs. Union vs. etc | The Best Defense:

"Billy Bowlegs" Image via Foreign Policy

So: Pro-Union Indians were fighting Confederates who, after being captured, agreed to fight other Indians for the Union? What a country.

One supposes Native American tribes might have sat back and said, "You guys go ahead and knock yourselves out."