April 30

• April 30, 311
  Emperor Galerius issues an edict of toleration during his last bout of illness which ends the Diocletianic Great Persecution in Roman Empire
• April 30, 313
  Licinius, the Augustus in the east, defeat superior army of co-emperor Maximinus, who dresses like a slave and fleds to Nicomedia, in the Battle of Tzirallum, unifing the whole of the eastern empire under his own rule
• April 30, 535
  Amalaswintha, a queen of the Ostrogoths, is murdered
• April 30, 711
  The Islamic troops approximately 1,700-strong led by Berber commander Tariq ibn Ziyad cross the Strait of Gibraltar, named after him, and invade Iberian Peninsula
• April 30, 1006
  The brightest recorded supernova, the SN 1006, is recorded by Chinese and Islamic astronomers
• April 30, 1562
  First French colonist Jean Ribault and group of Hugenots found the outpost States at Parris Island in modern southeastern United
• April 30, 1661
  General Zheng Chenggong of Ming China known as Koxinga begins siege of Dutch fort Zeelandia, Formosa defended by 2,000 Dutch soldiers
• April 30, 1725
  Emperor Charles VI and King Philip IV of Spain sign Treaty of Vienna, which guarantees the Pragmatic Sanction of the Habsburgs
• April 30, 1789
  George Washington is inaugurated as the first President of USA, taking oath of office on alter Bible of Saint John's Masonic Lodge in New York City
• April 30, 1803
  The United States purchases the Louisiana Territory from France for $15 million and doubles the size of the country by Louisiana Purchase Treaty
• April 30, 1828
  Shaka, one of the most influential monarchs of the Zulu Kingdom, is killed by three assassins
• April 30, 1838
  Nicaragua declares independence from Central American federation
• April 30, 1849
  Giuseppe Garibaldi, Italian republican patriot and guerrilla leader, repulses a French attack on Rome
• April 30, 1888
  Hailstones kill about 250 in Moradabad district of Delhi, India
• April 30, 1897
  Physicist Joseph John Thomson, who identified electrons using cathode rays, describes it as a particle of negative charge whose motion constitutes electricity at a meeting of the Royal Institution in London
• April 30, 1933
  Luis Miguel Sanchez Cerro, President of Peru, is assassinated by Hurtado de Mendoza, a member of the suppressed centre-left Peruvian political party
• April 30, 1945
  Adolf Hitler shot himself in his Fuhrerbunker in Berlin when Soviet troops were within a block of the Reich Chancellery; Karl Donitz is appointed leader of Germany
• April 30, 1967
  Ostankino Tower, the highest tower in the world, 537 meters, is finished, in Moscow, USSR
• April 30, 1975
  The last group of Americans are evacuated from Saigon, South Vietnam, during North Vietnamese invasion, ending Vietnam War after the decade of fighting and lost 58,000 American soldiers
• April 30, 1993
  CERN announced that the World Wide Web would be free to anyone, with no fees due