Hell Commandos -1 (1969)

An American special operations unit are sent behind enemy lines to kill or capture a Dutch scientist and destroy the deadly germ he has developed and the Nazis intend to use in combat. Unfortunately they are all killed by another group of American troops who mistake them for SS, bar the leader of the mission, who then co-opts their killers to complete the operation. Silly movie. The uniforms are wrong and the American troops are supposed to be US Marines, who to my knowledge did not fight in the European theater of war. But for all that, if you suspend belief, it's an enjoyable romp with a good bit of action. And there's something nasty in the water for those Nazis! There will be another clip to come from this one.