1975: After the withdrawal of American troops and the capture of Saigon by the North Vietnamese army, the Vietnam is reunified and the Socialist Republic proclaimed.
1948: In response to the Allies' decision to violate the Potsdam Accords by merging the American, English and French occupation zones and establishing the Deutschemark, Stalin decides to establish a blockade around Berlin.
1812 : The Great Army of Emperor Napoleon I crossed the Niemen and forced the borders of the empire of Tsar Nicolas I. The Napoleonic troops, nearly 700,000 strong, penetrated without difficulty inside Russia as far as Moscow.
1497: Left on May 2 aboard the "Matthew", the captain of Genoese origin Pooch reached Labrador, a peninsula in northeastern Canada.