World War II: Władysław Sikorski Becomes Polish Government-in-Exile Prime Minister, September 30, 1939

Albert Einstein and Leo Szilard write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon. Date: August 2, 1939 Read more on Wikipedia → 📅 Other events on August 2 📅 Events on this day in 1939 📅 On This Day (Today) More events from 1939Germany…

The Heinkel He 100 fighter sets a world airspeed record of 463 mph (745 km/h). Date: March 30, 1939 Read more on Wikipedia → 📅 Other events on March 30 📅 Events on this day in 1939 📅 On This Day (Today) More events from 1939World War II: Władysław Sikorski Becomes Polish Government-in-Exile Prime Minister, September 30,…

Madison Square Garden Nazi rally: The largest ever pro-Nazi rally in United States history is convened in Madison Square Garden, New York City, with 20,000 members and sympathizers of the German American Bund present. Date: February 20, 1939 Read more on Wikipedia → 📅 Other events on February 20 📅 Events on this day in…

An Imperial Japanese Army ammunition dump explodes at Hirakata, Osaka, Japan, killing 94. Date: March 1, 1939 Read more on Wikipedia → 📅 Other events on March 1 📅 Events on this day in 1939 📅 On This Day (Today) More events from 1939Baseball Hall of Fame Opens in Cooperstown, New York June 12, 1939Black…

Spanish Civil War: The Nationalists conclude their conquest of Catalonia and seal the border with France. Date: February 10, 1939 Read more on Wikipedia → 📅 Other events on February 10 📅 Events on this day in 1939 📅 On This Day (Today) More events from 1939Luftwaffe Ju 87 Crash at Neuhammer During Fog Demo,…