Events January–June January 7 – The Siculicidium is carried out as hundreds of the Székely minority in Transylvania are massacred by the Austrian Army at Madéfalva. January 19 – John Wilkes is expelled from the House of Commons of Great Britain, for seditious libel. February 15 – The settlement of St. Louis is established. March 15 – The day after his return to Paris from a nine-year mission, French explorer and scholar Anquetil Du Perron presents a complete copy of the Zoroastrian sacred text, the Zend Avesta, to the Bibliothèque Royale in Paris, along with several other traditional texts. In 1771, he publishes the first European translation of the Zend Avesta. March 17 – Francisco Javier de la Torre arrives in Manila to become the new Spanish Governor-General of the Philippines. March 20 – After the British victory in the French and Indian War, the first post-war British expedition to explore the newly acquired territories east of the Mississippi River comes under attack by Tunica warriors. The 340 British Army men, under the command of Major Arthur Loftus, were at a spot south of Natchez, Mississippi and were forced to flee in their boats back toward the port of New Orleans while under fire from an unknown number of Tunicas firing from both banks. March 23 – Following lobbying by George Johnstone, the Governor of British West Florida, Britain's Lords of Trade vote to recommend the northern boundary for the new province to run from the confluence of the Yazoo River and the Mississippi (at modern-day Vicksburg, Mississippi) to the Chattahoochee River (at modern-day Phenix City, Alabama), and the Privy Council soon approves, bringing about under the West Florida's jurisdiction. March 27 – The prince-electors, a group of nine German princes who select the next leader of the Holy Roman Empire, vote for the last time as the health of the Emperor Francis I declines. The electors (including Britain's King George III, who also rules as Elector of Hanover) approve Francis's son, Prince Joseph of Austria as King of the Romans. Upon the death of Francis in 1765, Prince Joseph becomes the Holy Roman Emperor Joseph II. March 31 – A mutual defense treaty between the Russian Empire and the Kingdom of Prussia is signed in Saint Petersburg between representatives of Russia's Empress Catherine the Great and Prussia's King Frederick the Great. By agreement, each nation agrees (for an eight-year