The film opens with the U.S. Army failing to capture the still-intact Oberkassel railway bridge. Lieutenant Hartman (George Segal) is an experienced combat team leader who is becoming weary of the war in Europe. After he is promoted to company commander following the reckless death of the previous officer, Hartman is ordered to advance to the Rhine River at Remagen where he is promised a rest for his men. At the same time, Major Paul Kreuger (Robert Vaughn) of the Wehrmacht is tasked with destroying the Remagen bridge by his friend and superior, Colonel General von Brock (Peter van Eyck), who has been given a written order to do it immediately. The general appeals to Kreuger's sense of honor, giving him a verbal command to defend the bridge for as long as possible, to allow the 15th Army (Wehrmacht) trapped on the west bank of the river to escape.