Gladiatorerna (1969) Peter Watkins

Some time in the future, East and West have stopped maintaining standing armies and nuclear weapons. Instead, to settle their differences they pit different teams of crack combat specialists against each other. 

Watkins' Gladiators a.k.a. Gladiatorena a.k.a. The Peace Game (1969) is a very interesting film that features a unique concept.The movie takes place in a alternate reality where warfare has been abolished. Countries that want to settle their disputes handle them inside a high tech arena. Each country sends in a crack squad of highly trained commandos. While inside, they play a game that's similar to "capture the flag". The supercomputer controlled arena is operated by technicians from neutral countries. The computer randomly puts up obstacles in the way of the commandos (adding a bit of intrigue to the game). The generals from the opposing forces (along with their allies) play a game of chess with their commandos, watching the proceedings from the safety of a control room (TV screens and computer monitors follow the action). Around the world, the game is televised (except in Russia, China and The United States). The TV programmers even have a say in the action (they have to satisfy the TV viewers).

Once again, Watkins uses his faux documentary style to capture it all on film. This movie's truly ahead of it's time. A concept like this one would make a great reality T.V. show. Highly recommended.