American Revolutionary War: In an act of retaliation against ports that supported Patriot activities in the early stages of the war, the Royal Navy destroyed what is now Portland, Maine.

The American Revolutionary War, also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continental Army and commanded by George Washington defeated the British Army. The conflict was fought in North America, the Caribbean, and the Atlantic Ocean. The war's outcome seemed uncertain for most of the war. But Washington and the Continental Army's decisive victory in the Siege of Yorktown in 1781 led King George III and the Kingdom of Great Britain to negotiate an end to the war in the Treaty of Paris two years later, in 1783, in which the British monarchy acknowledged the independence of the Thirteen Colonies, leading to the establishment of the United States as an independent and sovereign nation.

Patriots were colonists in the Thirteen Colonies who opposed the Kingdom of Great Britain's control and governance during the colonial era and supported and helped launch the American Revolution that ultimately established American independence. Patriot politicians led colonial opposition to British policies regarding the American colonies, eventually building support for the adoption of the Declaration of Independence, which was adopted unanimously by the Second Continental Congress on July 4, 1776.

The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the English Navy of the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service.