The Junkers Ju 87 or Stuka (from Sturzkampfflugzeug, "dive bomber") was a two-seat (pilot and rear gunner) German ground-attack aircraft. It first flew in 1935 and made its combat debut in 1936 as part of the Luftwaffe's Condor Legion during the Spanish Civil War. The aircraft was easily recognizable by its inverted gull wings, fixed spatted undercarriage and its infamous "Jericho Trumpet" wailing siren.