The Rat Patrol (1966) : 1x27

The Patrol stumbles on a German staff car but before they can attack it, the driver and a guard are killed by a third man\u2014who is apparently an American major. The major orders the Patrol to take him to where a high-level meeting is being held in secret. They do so, unaware that he is a German officer and that Dietrich is trailing them. However on the way they stumble on a unit of Italians who were badly injured and their officer\u2014returning with the Patrol to get his men help\u2014recognizes that the Major must be a German. Whereupon the German attempts to kill the Italian\u2014arousing Troy's suspicion.