1963 Gen. Tran Van Don informs Lucien Conein of the CIA that certain officers are planning a coup against South Vietnamese President Ngo Dinh Diem. Diem, who had been supported by the Kennedy administration, had refused to make any meaningful reforms and had oppressed the Buddhist majority. Conein informed Washington that the generals were plotting to overturn the government. President John F. Kennedy, who had come to the conclusion that the Diem government should no longer be in command, sent word that the United States would not interfere with the coup.
1957 Nikita Khrushchev takes control in the Soviet Union by orchestrating the ouster of his most serious opponents from positions of authority in the Soviet government. Khrushchev's action delighted the United States, which viewed him as a more moderate figure in the communist government of Russia.
1944 On this day in 1944, as part of Operation Gardening, the British and American strategy to lay mines in the Danube River by dropping them from the air, American aircraft also drop bombs and leaflets on German-occupied Budapest.
1863 The largest military conflict in North American history begins this day when Union and Confederate forces collide at Gettysburg. The epic battle lasted three days and resulted in a retreat to Virginia by Robert E. Lee's Army of Northern Virginia.