Shout at the Devil finds Lee Marvin in sub Sahara Africa in 1914 just before the start of World War I. He's a rollicking, live by your wits character named Flynn, very much similar to Humphrey Bogart's Charlie Allnut in The African Queen. Marvin takes up with an Englishman played by Roger Moore who's been stranded in Africa on his way to Australia.
Marvin has a running rivalry with the local German governor played with Teutonic relish by Reinhard Kolldehoff. He's the Road Runner to Kolldehoff's Wily Coyote. During the first half of the film, it plays just like a road runner cartoon.
When war is declared however, Kolldehoff crosses into British territory where Marvin has operated with sanctuary and exacts a terrible vengeance for being constantly made a fool of. On Marvin, on Moore, and on Barbara Parkins, Marvin's daughter who Moore has now married and had a child with.
This is World War I so the Germans aren't behaving like the Nazis of the second World War. But Kolldehoff you can see a potential recruit for Hitler in the post war years. In fact I don't think it's an accident that Kolldehoff and his character Fleischer look very much like German Field Marshal Ludendorff who was sympathetic to the early Nazi party.
Shout at the Devil is a broad comic adventure for the first half and turns serious in the second half. Moore and Marvin have a nice easy chemistry between them, Marvin is reaching back to his Cat Ballou days and the bag of scene stealing tricks he used to get an Oscar. Moore is hard pressed, but does keep up.
And who doesn't like a live road runner cartoon.