<Li> February 1--New York cedes to Congress its western claims, including territory west of Lake Ontario . In 1792 New York will sell the Erie Triangle to Pennsylvania </Li> <Li> March 14--Bombardment of Fort Charlotte: After a two - week siege, Spanish general, colonial governor of Louisiana, and Viceroy of New Spain Bernardo de Gálvez captures Fort Charlotte, taking the port of Mobile (in present - day Alabama) from the British . Fort Charlotte was the last remaining British frontier post capable of threatening New Orleans in Spanish Louisiana . Its fall drove the British from the western reaches of West Florida and reduced the British military presence in West Florida to its capital, Pensacola . </Li> <Li> April 8--Siege of Charleston: British Army troops under General Henry Clinton and naval forces under Admiral Mariot Arbuthnot besiege Charleston, South Carolina . British ships sail past Fort Moultrie on Sullivan's Island to occupy Charleston Harbor . Washington will order reinforcements to Charleston, but the city falls on May 12 in what is arguably the worst American defeat of the war . </Li> <Li> May 6--Siege of Charleston: Fort Moultrie falls to the British . </Li>

What was the first act of the american revolution