User:Hawkeye7/War/Selected anniversaries/April 20

April 20

 * 1689 - The former King James II of England, now deposed, lays siege to Derry.
 * 1775 - American Revolutionary War: American colonial force begin laying siege to British troops in Boston, Massachusetts
 * 1792 - France declares war on Austria.
 * 1861 - American Civil War: Robert E. Lee resigns his commission in the United States Army in order to command the forces of the state of Virginia.
 * 1918 - Manfred von Richthofen, aka The Red Baron, shoots down his 79th and 80th victims marking his final victories before his death the following day.
 * 1945 - US troops capture Leipzig, Germany, only to later cede the city to the Soviet Union.