Begins with the French and Indian War, which ended with the Treaty of Paris in 1763 and drastically altered the relationship between the colonists and the British crown. Tensions mounted over new taxes like the Stamp Act, leading to protests and the Declaration of Independence in 1776. Despite being the underdogs, the Continental Army won the American Revolution with the help of George Washington's leadership, guerilla warfare tactics, and support from allies like France. The new nation faced problems under the weak Articles of Confederation, leading to the Constitutional Convention and the ratification of the Constitution in 1789.