June 29

• June 29, 69
  Saint Peter, an early Christian leader and one of the Twelve Apostles of Jesus Christ, is crucified upside down at his own request, since he saw himself unworthy to be crucified in the same way as Jesus Christ, according to Christian tradition
• June 29, 1236
  Ferdinand III of Castile conquers Cordoba, the old Umayyad capital in Spain
• June 29, 1440
  Italian League led by the Republic of Florence beat the Milanese in the Battle of Anghiari
• June 29, 1504
  Diego Mendez, one of Columbus's captains, returned to Jamaica with a small caravel and rescued the Columbus expedition, that stumbled across the Cayman Islands
• June 29, 1541
  The Spanish explorer Francisco Vásquez de Coronado reaches Kansas during the exploration of American southwest
• June 29, 1767
  The British Parliament approved the Townshend Revenue Acts, sponsored by statesman Charles Townshend, which imposed import duties on glass, lead, paint, paper and tea shipped to America
• June 29, 1858
  China cedes north bank of Amur River to Russia by Treaty of Aigun
• June 29, 1880
  The new king of Tahiti, pushed by the governor Henri Isidore Chessé, abdicate in favor of France
• June 29, 1881
  Muhammad Ahmad, a religious leader of the Samaniyya order, proclaims himself as the Mahdi or messianic redeemer of the Islamic faith in Sudan and leads a successful military campaign against the Turco-Egyptian government of the Sudan
• June 29, 1888
  Professor Frederick Treves performs the first appendectomy, the surgical removal of the vermiform appendix, in England
• June 29, 1913
  Second Balkan War begins, when Bulgaria, dissatisfied with its share of the spoils of the First Balkan War, attacks its former allies, Serbia and Greece
• June 29, 1916
  Boeing Model 1, the first Boeing aircraft, flies for first time
• June 29, 1921
  Adolf Hitler becomes Führer of the National Socialist German Workers' Party, commonly called Nazi Party, as hyperinflation in the Weimar Republic begins

March 26

• March 26, 1027
  John XIX crowns Conrad II the Holy Roman emperor
• March 26, 1668
  England takes control of Bombay, modern Mumbai, India
• March 26, 1790
  US Congress passes Naturalization Act is passed and requires two-year residency only for "free white persons" to grant the national citizenship
• March 26, 1859
  Urbain Le Verrier, a French mathematician, publishes a thorough study of Mercury's motion and proposes existence of a small planet Vulcan in an orbit between Mercury and the Sun
• March 26, 1913
  Bulgaria captures Adrianople, ending the first Balkan War
• March 26, 1971
  Bangladesh Liberation War between East Pakistan and Islamic Republic of Pakistan, which leads to independence of Bangladesh from Pakistan, begins with military operation of Pakistan Army aimed to curb the Bengali nationalist movement
• March 26, 1971
  East-Pakistan is proclaimed independent state of Bangladesh as the Pakistan Army launched military operations against the people of East Pakistan
• March 26, 1975
  The biological weapons convention enters into force
• March 26, 1995
  The Schengen Agreement easing cross-border travel goes into effect in several European countries
• March 26, 2000
  Vladimir Putin, the Prime Minister of Russia and former officer in the KGB, is elected President, gradually leading Russia into authoritarian regime