Brass Target

Brass Target is a 1978 American post war suspense film, based on the novel The Algonquin Project by Frederick Nolan and directed by John Hough. It stars John Cassavetes, Robert Vaughn, George Kennedy, Patrick McGoohan and Max von Sydow.

The story opens in Europe days after VE Day. General Patton played by Kennedy, orders that gold reserves held by the former Reichsbank be transported to Frankfurt. But before the shipment arrives in the city, the train is robbed and its US Army MP guards are killed in a tunnel using poisonous gas.Its then revealed that a group of corrupt American officers, led by a colonel played by Vaughn, is behind the crime. The investigation, started by Patton, initially leads to OSS Major Joe De Luca played by Cassavetes. It seems the robbers used his plan from one of his wartime operations to steal the gold. ........

Source: Wikipedia