March 30

• March 30, 1282
  Inhabitants in Palermo massacres French occupation forces in Sicily after a Frenchman harassed a woman, beginning the War of the Sicilian Vespers
• March 30, 1533
  Henry VIII makes Thomas Cranmer archbishop of Canterbury
• March 30, 1842
  Crawford Long, an American surgeon, utilizes ether to remove a tumor from the neck of his patient, James Venable, which becomes the first case of using anesthesia
• March 30, 1856
  Representatives of the great powers in Europe sign Peace of Paris, which ends the Crimean War and restores the territories of Russia and Turkey to their prewar boundaries
• March 30, 1858
  Hymen Lipman of Philadelphia patents the pencil with an eraser attached on one end
• March 30, 1867
  United States Secretary of State William H. Seward signs an agreement with Russia's Baron Edouard de Stoeckl to purchase the territory of Alaska for US$7.2 million or $4.74 per square km
• March 30, 1870
  The 15th Amendment to the US Constitution, guaranteeing the right to vote regardless of race, is declared in effect by Secretary of State Hamilton Fish
• March 30, 1912
  French protectorate in Morocco is established with Treaty of Fez, which triggers riots in Fez, the capital of Morocco
• March 30, 1945
  USSR invades Austria
• March 30, 1950
  Phototransistor, a light-sensitive transistor, invention is announced, in Murray Hill, New Jersey, USA
• March 30, 1972
  North Vietnamese troops enter South Vietnam starting Easter Offensive