43 BC Cicero, considered one of the greatest sons of Rome, is assassinated on the orders of Marcus Antonius.
1787 Delaware becomes the first state to ratify the Constitution of the United States.
1917 The United States declares war on Austria-Hungary with only one dissenting vote in Congress.
1970 Poland and West Germany sign a pact renouncing the use of force to settle disputes, recognizing the Oder-Neisse River as Poland's western frontier, and acknowledging the transfer to Poland of 40,000 square miles of former German territory.
and ohh ya... one more
1941