WHAT ALL HAPPENED JUNE TO SEPTEMBER 1937
Find out what all happened June to September 1937

The Battle of Shanghai begins. (13. August 1937)

In the Spanish Civil War, the Basque Army surrenders to the Italian Corpo Truppe Volontarie following the Santoña Agreement. (24. August 1937)

Pennsylvania becomes the first (and only) state of the United States to celebrate Flag Day officially as a state holiday. (14. June 1937)

Chinese Air Force Day: The beginning of air-to-air combat of the Second Sino-Japanese War and World War II in general, when 6 Imperial Japanese Mitsubishi G3M bombers are shot down by the Nationalist Chinese Air Force while raiding Chinese air bases. (14. August 1937)

Spanish Civil War: Peña Blanca is taken; the end of the Battle of El Mazuco. (22. September 1937)

U.S. House of Representatives passes the Marihuana Tax Act. (14. June 1937)

Toyota Motors becomes an independent company. (28. August 1937)

Tōngzhōu Incident: in Tōngzhōu, China, the East Hopei Army attacks Japanese troops and civilians. (29. July 1937)

End of the Battle of Brunete in the Spanish Civil War. (26. July 1937)

The Duke of Windsor marries Wallis Simpson. (3. June 1937)

The world's first emergency telephone number, 999, is introduced in London (30. June 1937)

Turkey, Iran, Iraq and Afghanistan sign the Treaty of Saadabad. (8. July 1937)

Great Purge: The Soviet Union under Joseph Stalin executes eight army leaders. (11. June 1937)

J. R. R. Tolkien's The Hobbit is published. (21. September 1937)

Second Sino-Japanese War: Battle of Lugou Bridge – Japanese forces invade Beijing, China. (7. July 1937)

Josip Broz Tito reads the resolution "Manifesto of constitutional congress of KPH" to the constitutive congress of KPH (Croatian Communist Party) in woods near Samobor. (1. August 1937)

New Deal: the United States Senate votes down President Franklin D. Roosevelt's proposal to add more justices to the Supreme Court of the United States. (22. July 1937)

Second Sino-Japanese War: The Chinese Eighth Route Army gains a minor, but morale-boosting victory in the Battle of Pingxingguan. (25. September 1937)

Spanish Civil War: Llanes falls to the Nationalists following a one-day siege. (5. September 1937)

Nine nations attend the Nyon Conference to address international piracy in the Mediterranean Sea. (10. September 1937)