The Last Lion

The Last Lion is a 1972 South African action film directed by Elmo De Witt and starring Jack Hawkins, Karen Spies and Dawid Van Der Walt. The screenplay was written by Wilbur Smith, one of his rare original screenplays. He used a similar story later on in his novel A Time to Die.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.