The provided episode, offers an extensive historical overview of the Axis invasion and occupation of Yugoslavia and Greece during World War II. It details the background events, such as the preceding Greco-Italian War and the Yugoslavian coup d'état, which led to the German-led attack in April 1941. The episode then outlines the military course of action, including the rapid defeat and dismemberment of Yugoslavia and the operations against Greece, culminating in the Battle of Crete. Finally, the episode discusses the consequences of the campaign, focusing on the subsequent occupation and the resulting widespread partisan resistance, as well as the debate over whether the Balkan campaign significantly delayed the invasion of the Soviet Union.