The Junkers (Ju) 87, known as the "Stuka," spearheaded the Blitzkrieg ("lightning war") attacks that were decisive in the western campaign in 1940. Stuka dive-bombers closely supported German ground forces. They destroyed enemy strong points, aircraft, and airfields, and spread panic in rear areas. Although slow and easily shot down by Allied fighters, the Stukas proved devastatingly effective in the German invasions of Poland and western Europe, where Germany enjoyed superiority in the air. Stukas caused terror among Allied ground forces, who learned to recognize the telltale shriek of a bomber's dive. This German newsreel footage shows a Stuka raid during the German invasion of the Low Countries in 1940.