| Event |
Year |
Additional Info / Features / Trivia |
| Treaty of Versailles | 1919 | Ended WWI formally; harsh on Germany, sowed seeds of WWII |
| Women's Suffrage (USA) | 1920 | 19th Amendment granted voting rights; New Zealand first in 1893 |
| Stalin became USSR chief | 1924 | Doctrine: Leninism + Socialism in one country |
| The Great Depression | 1929 | Wall Street crash; global economic collapse |
| The New Deal | 1933 | Programs, public works, reforms by FDR to counter Depression |
| Berlin Olympic Games | 1936 | Nazi Germany; Jesse Owens won 4 golds, debunking racial myths |
| Annexation of Sudetenland | 1938 | Hitler annexed region of Czechoslovakia; Allies did nothing |
| WWII Begins | 1939 | Hitler attacked Poland; Allies declared war |
| Molotov–Ribbentrop Pact | 1939 | Non-aggression pact between Hitler and Stalin; partitioned Poland |
| Operation Barbarossa | 1941 | Hitler attacked USSR on June 22, 1941 |
| Pearl Harbour Bombing | 1941 | Dec 7, Japan attacked US Navy base; USA entered WWII |
| D-Day Invasion (Normandy) | 1944 | June 6, Operation Neptune; liberated France |
| Nuclear Bombing on Japan | 1945 | Little Boy (Hiroshima) and Fat Man (Nagasaki) |
| End of WWII | 1945 | Sept 2, Japan surrendered |
| Truman Doctrine | 1947 | US policy to contain Communism |
| Independence of Burma & Ceylon | 1948 | Freedom from Britain |
| The Marshall Plan | 1948 | European Recovery Program; $13B aid from USA |
| Birth of Israel | 1948 | May 15, first Arab-Israel War |
| Berlin Blockade | 1948 | June 24, USSR surrounded West Berlin; US airlift |
| Apartheid | 1948 | Start of apartheid in South Africa |
| Creation of NATO | 1949 | 30 member countries; North Macedonia joined 2020 |
| Rise of Communist China | 1949 | PRC established under Mao Zedong; ROC moves to Taiwan |
| USSR goes Nuclear | 1949 | 2nd nuclear country; UK 3rd, France 4th, China 5th |
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