Sturzkampfgeschwader 77 (StG 77) was a Luftwaffe dive bomber wing during World War II. From the outbreak of war StG 77 distinguished itself in every Wehrmacht major operation until the Battle of Stalingrad in 1942. If the claims made by StG 77 are accurate, it inflicted more damage to enemy ground forces than any other wing. It operated the Junkers Ju 87 dive-bomber exclusively in the combat role. The Dornier Do 17 and Messerschmitt Bf 110 were both used in the air reconnaissance role.

The invasion of Belgium or Belgian campaign, often referred to within Belgium as the 18 Days' Campaign, formed part of the larger Battle of France, an offensive campaign by Germany during the Second World War. It took place over 18 days in May 1940 and ended with the German occupation of Belgium following the surrender of the Belgian Army.