Play Dirty

Play Dirty is a 1969 British war film starring Michael Caine, Nigel Green and Harry Andrews. It was directed by Andre De Toth based on a screenplay by Melvyn Bragg and Lotte Colin. The films story is inspired by the exploits of units such as the Long Range Desert Group, Popskis Private Army and the SAS in North Africa during World War II.

Douglas, who is an expert in fuel pipes and installations, is chosen despite protesting that he is only a port contractor with an honorary commission. Douglass C.O. dismisses his pleas noting that he is wearing a British Army officers uniform and therefore cant disobey the order. So Douglas departs on what seems like a fantasy adventure when he is taken to a Senussi cafe, which is a front for Masters HQ, there Douglas bumps into Cyril Leech. Leech, a convicted criminal rescued from prison by Masters to lead his units sabotage missions, directs Douglas to Masters office.Next day, after being briefed and outfitted in Italian uniforms, Douglas, with the unwilling Leech, leads the unit out into the desert disguised as an Italian Army patrol. The unit is made up from convicted criminals that have been released to Masters command, these include Greek narcotics smuggler Kafkarides, Tunisian terrorist Sadok, rapist Boudesh, Turkish smuggler Kostas Manou and two homosexual Senussi tribesmen Hassan and Assine. ........

Source: Wikipedia