The Junkers Ju 87 or Stuka was a German dive bomber and ground-attack aircraft designed by Hermann Pohlmann and first flew in 1935 and made its combat debut in 1937 with the Luftwaffe's Condor Legion during the Spanish Civil War. It served the Axis forces in World War II. The aircraft was easily identifiable by its inverted gull wings and fixed spatted undercarriage. Upon the leading edges of its faired main gear legs were mounted the Jericho-Trompete wailing sirens, becoming the propaganda symbol of German air power and the Blitzkrieg victories of 1939–1942. The Ju 87 operated with considerable success in the close air support and anti-shipping at the outbreak of World War II.