http://www.thepeoplehistory.com/april4th.html
1818 - U.S.A. - Stars And Stripes
1818 : Congress decided the U.S. flag would consist of 13 red and white stripes represent the original Thirteen Colonies that rebelled against the British crown and became the first states in the Union, and 20 stars, with a new star to be added for every new state. The act specified that new flag designs should become official on the first July 4th (Independence Day) following admission of one or more new states.
1916 - France - World War I Battle Of The Somme
One of the most costly battles in modern wartime is fought near the Somme Region and over 2 years when this small area of countryside saw the deaths of over 1 million men from both sides of the war.
1920 - Palestine - Riots
: Violence erupts between Arab and Jewish residents in British-controlled Jerusalem from This Day to the April 7th with 9 killed and 216 injured.