World War II: Battle of Crete: German paratroops invade Crete. Date: May 20, 1941 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1941 📅 On This Day (Today)

The Luttra Woman, a bog body from the Early Neolithic period (radiocarbon-dated c. 3928–3651 BC), was discovered near Luttra, Sweden. Date: May 20, 1943 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1943 📅 On This Day (Today)

Generalissimo Chiang Kai-shek wins the 1948 Republic of China presidential election and is sworn in as the first President of the Republic of China at Nanjing. Date: May 20, 1948 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1948 📅 On This Day (Today)

In the United States, the Armed Forces Security Agency, the predecessor to the National Security Agency, is established. Date: May 20, 1949 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1949 📅 On This Day (Today)

In Operation Redwing, the first United States airborne hydrogen bomb is dropped over Bikini Atoll in the Pacific Ocean. Date: May 20, 1956 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1956 📅 On This Day (Today)

Capital Airlines Flight 300 collides in mid-air with a United States Air Force Lockheed T-33 over Brunswick, Maryland, killing 12. Date: May 20, 1958 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1958 📅 On This Day (Today)

Discovery of the cosmic microwave background radiation by Robert Woodrow Wilson and Arno Penzias. Date: May 20, 1964 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1964 📅 On This Day (Today)

One hundred twenty-one people are killed when Pakistan International Airlines Flight 705 crashes at Cairo International Airport. Date: May 20, 1965 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1965 📅 On This Day (Today)

The Popular Movement of the Revolution political party is established in the Democratic Republic of the Congo. Date: May 20, 1967 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1967 📅 On This Day (Today)

The Battle of Hamburger Hill in Vietnam ends. Date: May 20, 1969 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1969 📅 On This Day (Today)