American Revolutionary War: Baron von Steuben arrives at Valley Forge, Pennsylvania, to help train the Continental Army.

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.

Friedrich Wilhelm August Heinrich Ferdinand Freiherr von Steuben, also referred to as Baron von Steuben, was a Prussian-born army officer who played a leading role in the American Revolutionary War by reforming the Continental Army into a disciplined and professional fighting force. His contributions marked a significant improvement in the performance of U.S. troops.

The village of Valley Forge is an unincorporated settlement. It is located on the west side of Valley Forge National Historical Park at the confluence of Valley Creek and the Schuylkill River in Pennsylvania. The remaining village is in Schuylkill Township of Chester County. It once spanned Valley Creek into Montgomery County.

The Continental Army was the army of the United Colonies representing the Thirteen Colonies and later the United States during the American Revolutionary War. It was formed on June 14, 1775, by a resolution passed by the Second Continental Congress, meeting in Philadelphia after the war's outbreak at the Battles of Lexington and Concord on April 19, 1775. As a result, the U.S. Army Birthday is celebrated on June 14.