| 313 |
|
Licinius unifies the whole of the eastern Roman Empire under his own rule. |
| 1250 |
|
King Louis IX of France is ransomed. |
| 1527 |
|
Henry VIII of England and King Francis of France sign treaty of Westminster. |
| 1563 |
|
All Jews are expelled from France by order of Charles VI. |
| 1725 |
|
Spain withdraws from the Quadruple Alliance. |
| 1789 |
|
George Washington is inaugurated as the first U.S. president. |
| 1803 |
|
The United States doubles in size through the Louisiana Purchase, which was sold by France for $15 million. |
| 1812 |
|
Louisiana is admitted into the Union as a state. |
| 1849 |
|
Giuseppe Garabaldi, the Italian patriot and guerrilla leader, repulses a French attack on Rome. |
| 1864 |
|
Work begins on the Dams along the Red River, which will allow Union General Nathaniel Banks' troops to sail over the rapids above Alexandria, Louisiana. |
| 1930 |
|
The Soviet Union proposes a military alliance with France and Great Britain. |
| 1931 |
|
The George Washington Bridge, linking New York City and New Jersey, opens. |
| 1943 |
|
The British submarine HMS Seraph drops 'the man who never was,' a dead man the British planted with false invasion plans, into the Mediterranean off the coast of Spain. |
| 1945 |
|
Adolf Hitler commits suicide in his bunker. Karl Donitz becomes his successor. |
| 1968 |
|
U.S. Marines attack a division of North Vietnamese troops in the village of Dai Do. |
| 1970 |
|
U.S. troops invade Cambodia to disrupt North Vietnamese Army base areas. |
| 1972 |
|
The North Vietnamese launch an invasion of the South. |
| 1973 |
|
Nixon announces the resignation of H.R. Haldeman, John Ehrlichman, and other top aides. |
| 1975 |
|
North Vietnamese troops enter the Independence Palace of South Vietnam in Saigon ending the Vietnam War. |
| 1980 |
|
Terrorists seize the Iranian Embassy in London. |
|
Born on April 30 |
| 1777 |
|
Karl Friedrich Gauss, German mathematician. |
| 1858 |
|
Mary Scott Lord Dimmick, First Lady to President Benjamin Harrison . |
| 1870 |
|
Franz Lehár, Hungarian composer (The Merry Widow, The Land of Smiles). |
| 1909 |
|
Juliana, Queen of the Netherlands. |
| 1912 |
|
Eve Arden (Eunice Quedens), actress. |
| 1933 |
|
Willie Nelson, country singer. |
| 1945 |
|
Annie Dillard, writer (Pilgrim at Tinker Creek). |
| 1954 |
|
Jane Campion, New Zealand film director (The Piano, A Portrait of a Lady). |