The uneasy wartime alliance between Washington and Moscow starts cracking almost before the guns of World War Two go quiet, and this History Hit documentary tracks the break using archival footage from the period. It opens at Potsdam, where the Allies carve up a defeated Germany and the fault lines of a new conflict already show, then follows the Marshall Plan's reconstruction money running head to head against Soviet extraction of resources from occupied territory. The nuclear arms race gets its own stretch, from the first Soviet bomb test to the strategic buildup that follows, before the film moves through the flashpoints that defined the era: the Berlin Airlift, in which Allied planes keep a divided city fed against a Soviet blockade, and the Cuban Missile Crisis, which brings the two powers to the edge of nuclear war. The film relies on period footage and narration to trace how a wartime partnership curdled into decades of confrontation, ending with the crises that set the pattern for everything that followed.