Forgotten Films: Dark of the Sun (1968)

The original title of the movie in Britain was just The Mercenaries. 

There's a real shortage of good mercenary movies out there, but among the few that are good, is Dark of the Sun. Released in 1968, it tells a common tale of the time, being set in the Congo, and involves mercenaries being hired to rescue European civilians in a remote mining town, but this is only a cover for the real mission on retrieving 50 million in diamonds in the company safe. There's tension with not only the enemy rebels, but also a potential the enemy within, namely a former nazi being one of the mercenaries on the team, which is of dubious trust. It's a pretty simple premise, but with excellent action and a soundtrack so good, it was reused by Quentin Tarantino in inglorious Basterds. It's also got some big name stars in it for the time, as well as being super controversial for the extreme action in the day. It still holds up and I would highly recommend it. Here's an HD remastered trailer for the movie: