April 15: Tax Day in the United States; Father Damien Day in Hawaii; Birthday of the Great Leader in North Korea * 1715 – The Yamasee War between colonial South Carolina and various Native American Indian tribes began. * 1755 – A Dictionary of the English Language by Samuel Johnson was first published, becoming one of the most influential dictionaries in the history of the English language. * 1912 – The passenger liner RMS Titanic sank about two hours and forty minutes after colliding with an iceberg , killing over 1,500 people. * 1947 – Jackie Robinson, the first African American to break the baseball color line, played his first game in Major League Baseball. * 1986 – U.S. armed forces began bombing Libya to try to reduce that country's ability to support international