September 28

48 BC – Pompey disembarks at Pelusium upon arriving in Egypt, whereupon he is assassinated by order of King Ptolemy XIII. 235 – Pope Pontian resigns. He is exiled to the mines of Sardinia, along with Hippolytus of Rome. 351 – Constantius II defeats the usurper Magnentius. 365 – Roman usurper Procopius bribes two legions passing by Constantinople, and proclaims himself emperor. 935 – Duke Wenceslaus I of Bohemia is murdered by a group of nobles led by his brother Boleslaus I, who succeeds him. 995 – Boleslaus II, Duke of Bohemia, kills most members of the rival Slavník dynasty. 1066 – William the Conqueror lands in England, beginning the Norman conquest. 1106 – King Henry I of England defeats his brother Robert Curthose at the Battle of Tinchebray. 1238 – King James I of Aragon conquers Valencia from the Moors. Shortly thereafter, he proclaims himself king of Valencia. 1322 – Louis IV, Holy Roman Emperor, defeats Frederick I of Austria in the Battle of Mühldorf. 1538 – Ottoman–Venetian War: The Ottoman Navy scores a decisive victory over a Holy League fleet in the Battle of Preveza. 1542 – Juan Rodríguez Cabrillo of Portugal arrives at what is now San Diego, California. He is the first European in California. 1779 – American Revolution: Samuel Huntington is elected President of the Continental Congress, succeeding John Jay. 1781 – American Revolution: French and American forces backed by a French fleet begin the siege of Yorktown. 1787 – The Congress of the Confederation votes to send the newly written United States Constitution to the state legislatures for approval. 1821 – The Declaration of Independence of the Mexican Empire is drafted. It will be made public on 13 October. 1844 – Oscar I of Sweden–Norway is crowned king of Sweden. 1867 – Toronto becomes the capital of Ontario, having also been the capital of Ontario's predecessors since 1796. 1868 – The Battle of Alcolea causes Queen Isabella II of Spain to flee to France. 1871 – The Brazilian Parliament passes a law that frees all children thereafter born to slaves, and all government-owned slaves.