April 17, 1915For the first time the German Army uses poison gas in the First World War. The use of this weapon kills thousands of Allied soldiers.

April 18, 1955The Asia-Africa Conference is held in Bandung. The conference, which is attended by 29 countries, leads to the formation of the Nonaligned Movement.

April 19, 1993The 51-day siege at the Branch Davidian compound near Waco, Texas, ends as fire destroys the structure after federal agents b