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Pluto discovery
On February 18, 1930, Pluto is found and officially named a planet. -
The first FIFA world cup
On July 13, 1930, the first ever FIFA world cup occurred. -
Star-Spangled Banner anthem is adopted
On March 3, 1931, the Star-Spangled Banner was adopted. -
China Yangtze river flooding
In August 18, 1931, the Yangtze river of China floods and takes many lives, both directly and indirectly, possibly even being the worst natural disaster of the century. -
Amelia Earhart starts the journey of flying over the Atlantic alone.
Amelia Earhart becomes the first woman (And the second person) to fly over the Atlantic ocean solo without stopping. -
21st amendment passed
On December 5th, 1933, the 21st amendment, "repeal of prohibition" was passed, cancelling the affect of the 18th amendment. -
First ever NFL game
In December 17, 1933, the first true NFL game occurred. -
Hitler titled as Fuhrer
On August 2nd, 1934, Hitler is titled as Fuhrer in Germany. -
Black Sunday hits
The worst dust storm recorded in history occurred on April 15, 1935. -
Chaco war ending
On June 12, 1935, the Chaco war ended. -
Ovada dam collapse
On August 13, 1935, a dam in Ovada collapsed and caused a massive flood. The number of deaths is unkown, but is likely very high. -
Gainesville tornados
On April 6, 1936, two very dangerous tornadoes swept through Gainesville and killed hundreds, with the exact number being unknown. The disaster is regarded as the 5th worst disaster in American history. -
Golden Gate finished construction
On April 19, 1937, the Golden Gate finished construction after 4 years. The bridge wasn't open until May 27, 1937. -
Memorial Day massacre
On May 30 1937, police shot 50 unarmed civilians, 10 of which died. 100 other civilians were beaten with clubs. -
Munich agreement is signed
Germany, Great Britain, Italy and France signed the Munich agreement on September 29, 1938. -
HMS Thetis sinking
On June 1st, 1939, the submarine "HMS Thetis" sinks. -
WWII starts
WWII started on September 1st, 1939 -
Battle of France begins
On May 10, 1940, the Battle of France started. -
Non-aggression pact between Japan and USSR
In April 13, 1941, a neutrality pact is formed between Japan and the USSR. -
Pearl Harbor bombing
On December 7, 1941, Japan sent a surprise attack to Pearl Harbor, causing 2,403 deaths.