The American Revolution was more than a military conflict; it included many conflicts and disputes between Great Britain and the colonies during the 1760s and early 1770s. Boston was a center of resistance, as is evidenced by the 1770 Boston Massacre and the Tea Party of 1773. Hostilities broke out in Massachusetts in 1775, and the following year the Second Continental Congress, meeting in Philadelphia, declared independence from the mother country.
The Revolutionary War was initially fought in the North as the British took New York and attempted to isolate New England from the other states. The war then moved to the South, where the British enjoyed initial success but ultimately met with defeat at Yorktown in 1781. The Treaty of Paris, by which Great Britain formally recognized the United States as a sovereign nation, was ratified in 1773.