Vance finds a letter on McQuade 's body that a Union officer is on his way from Washington , D.C. to parlay with the Apache chiefs .
Soon afterwards McQuade is attacked and killed by Apaches .
Vance finds a letter on McQuade 's body that a Union officer is on his way from Washington , D.C. to parlay with the Apaches chiefs .
Soon afterwards McQuade is attacked and killed by Apaches .