The first thing you notice about this film is the racist MPAA. Despite it being rated PG for war violence, there was nudity. Breasts were exposed, but they weren't those of Barbara Parkins ("Peyton Place", Valley of the Dolls, and her skintastic moment in Breakfast in Paris), but of African natives. Seems that black breasts are not taboo for children to see.
But, to the film itself. It is actually two films. The first half in 1912, has Lee Marvin (Cat Ballou, Paint Your Wagon) as a drunken ivory poacher who manages to get Roger Moore (The Spy Who Loved Me, "The Saint") to partner up with him. After Moore and Parkins (Marvin's daughter) plan to marry, there is a great fight scene reminiscent of many John Wayne pictures.
Then the film changes. World War I is declared and the Germans are on the march led by Reinhard Kolldehoff (Moon Over Parador, "The Winds of War"), a big fat German pig whose men slaughter Moore and Parkins baby, and set them on a search for revenge.
The film has plenty of action, including what I would call a paper mache bi-plane which almost takes Moore's life, and culminates in the blowing up of a German battleship that had run over Moore and Marvin earlier.
Marvin was extremely funny and Moore looked just great painted black to get on the ship. Parkins was radiant throughout, even when consumed with revenge for the murder of her baby.
Sir Ian Holm (Chariots of Fire) was also fantastic as Marvin's mute servant.