The Only Things That Happened On This Day In History
1863 The Civil War Battle of Gettysburg began.
1867 Canada became a self-governing dominion of Great Britain.
1946 The United States exploded a 20-kiloton atomic bomb near Bikini Atoll in the Pacific Ocean.
1966 The Medicare federal insurance program went into effect.
1984 The Motion Picture Association of America established the “PG-13” rating.
1997 Hong Kong reverted to Chinese rule after 156 years as a British colony.