1944: While Royal Air Force Bomber Command conducted airstrikes at Berlin with 891 aircraft, American bombers drop 1,150 tons of bombs and incendiaries on the abbey on Monte Cassino, Italy. Despite the bombing, the abbey’s destruction results only in a propaganda coup for the Germans and does nothing to weaken the mountain’s defenses. Read about the events surrounding the attack on Monte Cassino on HistoryNet.com.
1898: The U.S. Navy battleship Maine blew up in Cuba's Havana Harbor, with 258 of its crew killed by the explosion. The cause was never been absolutely ascertained, but it led the United States to declare war on Spain on April 25.
1900: British troops under Lieutenant-General John French relieved Kimberley, South Africa, breaking four months of being besieged by the Boers.