Born to Die — William M. James

Cuchillo Oro played the waiting game. Waited for his hated enemy Cyrus Pinner to marry. Waited for Pinner's wife to bear a child. Then he would take Pinner's life as he had Oro's wife and child. But in a twist of fate Oro is forced to escort Pinner and his wife and others to Fort Davidson where it all began. Not before facing down a war party of Chiricahua Apaches hellbent on killing them all.