on July 31, bringing an end to hostilities between England and its three opponents. August 25 – In China, 14-year-old Xuanye, the Kangxi Emperor, participates in an ascension ceremony to take full power to rule China, bringing an end to the domination of the "Four Regents" who had been ruling in his name when he had first inherited the throne at the age of 6. The move comes shortly after the August 12 death of one of the regents, Sonin, when it becomes clear that the regents were planning to expand their power in advance of Kangxi's coming of age. September 6 – The "Dreadful Hurricane of 1667" ravages southeast Virginia, bringing 12 days of rain, blowing down plantation homes and stripping fields of crops. October–December October 18 – Yohannes I becomes king of Ethiopia, following the death of his father Negus Fasilides. November 2 – In India, Assam troops led by General Lachit Borphukan, dispatched by King Supangmung, captures the Mughal Empire city of Guwahati after a victory in battle at Itakhuli. November 25 – A devastating earthquake rocks Caucasia and kills 80,000 people. December 19 – Emperor Aurangzeb, ruler of the Mughal Empire in India, orders a massive counterattack on Assam's Ahom kingdom after learning that Mughal troops had captured Guwahati. Aurangzeb appoints Raja Ram Singh to command a force of 36,000 infantry, 18,000 cavalry, 2,000 archers and 40 ships to conquer Ahom. The war lasts until the defeat of the Mughals by the smaller Ahom force in March 1671. Date unknown After Shivaji's escape, hostilities between the Marathas and the Mughals ebb, with Mughal sardar Jaswant Singh acting as intermediary between Shivaji and Aurangzeb for new peace proposals. The first military campaign of Stenka Razin is conducted in Russia. The French army uses grenadiers. Robert Hooke demonstrates that the alteration of the blood in the lungs is essential for respiration. Isaac Newton has investigated and written on optics, acoustics, the infinitesimal calculus, mechanism and thermodynamics. The works will be published only years later. Births April 29 – John Arbuthnot, English physician and writer (d. 1735) May 26 – Abraham de Moivre, French mathematician (d. 1754) June 18 – Ivan Trubetskoy, Russian field marshal (d. 1750) July 2 – Pietro Ottoboni, Italian cardinal (d. 1740) July 27 – Johann Bernoulli, Swiss mathematician (d. 1748) August 11 – Anna Maria Luisa de' Medici, last of the Medicis of Italy