Apache Ambush by Chet Cunningham
He was half Apache, half white. As a boy, he had seen his Indian mother gunned down by the hated bluecoats during an attack on his village. Now, years later, here he was, Wade Chisholm, scout for the U.S. Cavalry, alone in Apache country, asked to locate the hostiles - his people - then decide if he had the stomach to lead soldiers in the massacre of another village. But "Longknife" knew the Apaches had already filled the desolate desert. The Apache death chant. Chisholm was as good as dead!