1775 – The Continental Army is established by the Continental Congress, marking the birth of the U.S. Army.
1777 – The Stars and Stripes is adopted by Congress as the Flag of the United States.
1846 – Bear Flag Revolt begins: Anglo settlers in Sonoma, California, start a rebellion against Mexico and proclaim the California Republic.
1900 – Hawaii becomes a United States Territory.
1922 – President Warren G. Harding became the first president to broadcast a message over the radio.
1933 – The first Superman comic book – Action Comic No. 1 – was published.
1954 – President Dwight D. Eisenhower signs a bill into law that places the words “under God” into the Pledge of Allegiance.