WHAT ALL HAPPENED FEBRUARY TO SEPTEMBER 1939
Find out what all happened February to September 1939

The first commercial FM radio station in the United States is launched in Bloomfield, Connecticut. The station later becomes WDRC-FM.[citation needed ] (13. May 1939)

Judge Joseph Force Crater, known as the "Missingest Man in New York", is declared legally dead. (6. June 1939)

World War II: Italy invades Albania. (7. April 1939)

The United Kingdom and Poland form a military alliance in which the UK promises to defend Poland in case of invasion by a foreign power. (25. August 1939)

Switzerland mobilizes its forces and the Swiss Parliament elects Henri Guisan to head the Swiss Army (an event that can happen only during war or mobilization). (1. September 1939)

World War II: France, the United Kingdom, New Zealand and Australia declare war on Germany after the invasion of Poland, forming the Allies. (3. September 1939)

Generalísimo Francisco Franco becomes the 68th "Caudillo de España", or Leader of Spain. (5. February 1939)

Carpatho-Ukraine declares itself an independent republic, but is annexed by Hungary the next day. (15. March 1939)

Romanian Prime Minister Armand Călinescu is assassinated by far-right legionnaires of the fascist paramilitary organization called the Iron Guard. (21. September 1939)

Marian Anderson sings at the Lincoln Memorial, after being denied the right to sing at the Daughters of the American Revolution's Constitution Hall. (9. April 1939)

Taisto Mäki becomes the first man to run the 10,000 metres in under 30 minutes, in a time of 29:52.6 (17. September 1939)

General George C. Marshall becomes Chief of Staff of the United States Army. (1. September 1939)

World War II: The submarine HMS Oxley is mistakenly sunk by the submarine HMS Triton near Norway and becomes the Royal Navy's first loss. (10. September 1939)

World War II: The Battle of Kępa Oksywska concludes, with Polish losses reaching roughly 14% of all the forces engaged. (19. September 1939)

Joint victory parade of Wehrmacht and Red Army in Brest-Litovsk at the end of the Invasion of Poland. (22. September 1939)

Lina Medina becomes the youngest confirmed mother in medical history at the age of five. (14. May 1939)

Cardinal Eugenio Pacelli is elected Pope and takes the name Pius XII. (2. March 1939)

Nazi Germany mounts a staged attack on the Gleiwitz radio station, creating an excuse to attack Poland the following day thus starting World War II in Europe. (31. August 1939)

Huỳnh Phú Sổ founds Hòa Hảo Buddhism. (4. July 1939)

Lou Gehrig, recently diagnosed with Amyotrophic lateral sclerosis, informs a crowd at Yankee Stadium that he considered himself "The luckiest man on the face of the earth", then announces his retirement from major league baseball. (4. July 1939)