Shout at the Devil is a 1976 British war adventure film directed by Peter R. Hunt and starring Lee Marvin and Roger Moore.

The film, set in Zanzibar and German East Africa in 1913–1914, is based on a novel by Wilbur Smith which is very loosely inspired by the sinking of the SMS Königsberg.

Colonel Flynn O'Flynn, a hard-drinking American, manipulates British aristocrat Sebastian Oldsmith into helping poach ivory in Tanganyika, which is part of the German-controlled pre-World War I territory of German East Africa.

On hearing news that the American has returned to poaching, Herman Fleischer, the local German Commander of the Southern Provinces, relentlessly hunts O'Flynn with his Schutztruppe.

Fleischer fights back by having his Schutztruppe attack and raze to the ground O'Flynn's home killing his granddaughter in the process.

But when it is discovered that Britain is at war with Germany, Royal Navy officers convince O'Flynn to locate and destroy the German warship, SMS Blücher which is hiding awaiting repair.

The main story is loosely based on events concerning the light cruiser SMS Königsberg, which was sunk after taking refuge in Rufiji Delta in 1915.

[4] Ivory hunter P J Pretorius had gone aboard Königsberg disguised as a native to pace out the ranges for the Royal Navy's guns.

Although the motives for killing Fleischer are personal, Sebastian Oldsmith is, in fact, the only major character who is a citizen of a nation actually at war with Germany.

[2] It was the 14th most successful film in the UK for the year 1976 having spent a week at number one (24 April 1976) on the box office chart.

All that action, conducted by characters without character—except for Fleischer, whose childlike joy in hurting people is almost appealing—produces lethargy...the movie is a passable midget in absurdly long pants.

"[16] Film critic Roger Ebert thought that "Shout at the Devil is a big, dumb, silly movie that's impossible to dislike.

It's so cheerfully corny, so willing to involve its heroes in every possible predicament, that after a while we relax: This is the kind of movie they used to make, back when audiences were supposed to have the mentality of a 12-year-old.