20 – Patria Boba: A junta of seven patriots, led by José Acevedo y Gómez, assemble in Bogotá in the Viceroyalty of New Granada (modern-day Colombia), to declare its independence from the Spanish Empire. July 24 - Paraguay governor Bernardo de Velasco and the Cabildo of Asunción declare their loyalty to Ferdinand VII to Spain and break up their relationship with Buenos Aires. August 2 – In Quito, Ecuador, 200 citizens are slaughtered in the Royal barracks and the surrounding streets, by royalist troops. August 6 – The city of Santa Cruz de Mompox, in modern-day Colombia, declares independence from the Spanish Empire. August 20–27 – Battle of Grand Port: The French defeat a Royal Navy frigate squadron attempting to blockade a harbour on Isle de France (Mauritius). August 21 – Jean Baptiste Bernadotte, Marshal of France, is elected Crown Prince of Sweden, by the Swedish Riksdag of the Estates. September 8 – The Tonquin sets sail from New York Harbor, with 33 employees of John Jacob Astor's newly created Pacific Fur Company on board. After a six-month journey around the tip of South America, the ship arrives at the mouth of the Columbia River, and Astor's men establish the fur-trading town of Astoria. September 16 – Grito de Dolores: Miguel Hidalgo, a Catholic priest from Guanajuato, incites the revolt that becomes the Mexican War of Independence. September 18 – Chile forms its First National Junta, which is the country's first step towards its independence. September 22 - Manuel Belgrano prepares his invasion to the Provincia del Paraguay. September 23 – The Republic of West Florida declares independence from Spain. September 26 – A new Act of Succession is adopted by the Riksdag of the Estates, and Jean Baptiste Bernadotte becomes heir to the Swedish throne. October–December October – King George III of the United Kingdom is deemed permanently insane. October 12 – First Oktoberfest: Bavarian royalty invites the citizens of Munich to join the celebration of the marriage of Crown Prince Ludwig of Bavaria, to Princess Therese of Saxe-Hildburghausen. October 27 – The United States annexes the Republic of West Florida. November 2 – A peace treaty in Haiti confirms its division between the northern State of Haiti, ruled autocratically by the gen de couleur Henri Christophe, and the southern Republic, ruled by mulatto Alexandre Pétion. November 17 – Anglo-Swedish War (1810–12): Sweden declares war on the United Kingdom.