place across parts of North America, from Texas to Virginia. June 28 – American Revolutionary War – Battle of Monmouth: George Washington's Continental Army battles British general Sir Henry Clinton's army to a draw, near Monmouth County, New Jersey. June – The Anglo-French War (1778–83) begins. July–September July 3 – American Revolutionary War – The Battle of Wyoming takes place near Wilkes-Barre, Pennsylvania, ending in a terrible defeat for the local colonists. July 4 – American Revolutionary War – George Rogers Clark takes Kaskaskia. July 10 – Louis XVI of France declares war on the Kingdom of Great Britain. July 27 – American Revolutionary War – First Battle of Ushant – British and French fleets fight to a standoff. August 3 – The La Scala Opera House opens in Milan, with the première of Antonio Salieri's Europa riconosciuta. August 26 – Triglav, at above sea level the highest peak of Slovenia, is ascended for the first time by four men: Luka Korošec, Matevž Kos, Štefan Rožič, and Lovrenc Willomitzer, on Sigmund Zois' initiative. August 29 – American Revolutionary War – The tactically inconclusive Battle of Rhode Island takes place, after which the Continental Army abandons its position on Aquidneck Island. September – The Massachusetts Banishment Act, providing punishment for Loyalists, is passed. September 7 – American Revolutionary War – Invasion of Dominica: The French capture the British fort there, before the latter is aware that France has entered the war in the Franco-American alliance. September 17 – The Treaty of Fort Pitt is signed, the first formal treaty between the United States and a Native American tribe (the Lenape or Delaware). September 19 – The Continental Congress passes the first budget of the United States. October–December October 12 – The Continental Congress advises the 13 member states to suppress "theatrical entertainments, horse-racing, gaming, and such other diversions as are productive of idleness, dissipation, and general depravity of principles and manners." November 11 – American Revolutionary War: Cherry Valley massacre – British forces and their Iroquois allies attack a fort and the village of Cherry Valley, New York, killing 14 soldiers and 30 civilians. November 26 In the Hawaiian Islands, Captain James Cook becomes the first European to land on Maui. New Jersey becomes the second state to agree to the Articles of Confederation. December 10 – John Jay of New York is chosen as the sixth President of the Continental