The Guang'anmen Incident (Japanese: 広安門事件, Hepburn: Kōanmmon Jiken), or Kuanganmen Incident, was an attack on the Japanese army by the National Revolutionary Army’s 29th Army that occurred on 26 July 1937 in the opening stages of the Second Sino-Japanese War in Beiping, now Beijing, which was the under the control of the Hebei–Chahar Political Council.