WHAT ALL HAPPENED MARCH TO APRIL 1937
Find out what all happened March to April 1937

Spanish Civil War: The Battle of Guadalajara begins. (8. March 1937)

The Philippines holds a plebiscite for Filipino women on whether they should be extended the right to suffrage; over 90% would vote in the affirmative. (30. April 1937)

Aden becomes a British crown colony. (1. April 1937)

Spanish Civil War: Jaén, Spain is bombed by Nazi forces. (1. April 1937)

The Kamikaze arrives at Croydon Airport in London – it is the first Japanese-built aircraft to fly to Europe. (9. April 1937)

The Steel Workers Organizing Committee signs a collective bargaining agreement with U.S. Steel, leading to unionization of the United States steel industry. (2. March 1937)

The human-powered aircraft, Pedaliante, flew 1 kilometre (0.62 mi) outside Milan. (18. March 1937)

Spanish Civil War: Guernica (or Gernika in Basque), Spain is bombed by German Luftwaffe. (26. April 1937)

The New London School explosion killed 300 people, mostly children. (18. March 1937)

Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England. (12. April 1937)

Spanish Civil War: Spanish Republican forces defeated the Italians at the Battle of Guadalajara. (18. March 1937)

Ponce Massacre: 18 people and a 7-year-old girl in Ponce, Puerto Rico, are gunned down by a police squad acting under orders of US-appointed Governor, Blanton C. Winship. (21. March 1937)