Independence Hall in the context of "United States Declaration of Independence"

The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution defined the foundational structure of the federal government.

The drafting of the Constitution by many of the nation's Founding Fathers, often referred to as its framing, was completed at the Constitutional Convention, which assembled at Independence Hall in Philadelphia between May 25 and September 17, 1787. Influenced by English common law and the Enlightenment liberalism of philosophers like John Locke and Montesquieu, the Constitution's first three articles embody the doctrine of the separation of powers, in which the federal government is divided into the legislative, bicameral Congress; the executive, led by the president; and the judiciary, within which the Supreme Court has apex jurisdiction. Articles IV, V, and VI embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the process of constitutional amendment. Article VII establishes the procedure used to ratify the constitution.

The Constitutional Convention took place in Philadelphia from May 25 to September 17, 1787. While the convention was initially intended to revise the league of states and the first system of federal government under the Articles of Confederation, leading proponents of the Constitutional Convention, including James Madison of Virginia and Alexander Hamilton of New York, sought to create a new frame of government rather than revise the existing one. Delegates elected George Washington of Virginia, former commanding general of the Continental Army in the American Revolutionary War and a proponent of a stronger national government, to serve as president of the convention. While the Constitutional Convention has been the only Federal one, the fifty states have held 233 constitutional conventions. The convention ultimately debated and ratified the Constitution of the United States, making the convention one of the most significant events in American history.

The convention took place in Pennsylvania State House, later renamed Independence Hall, in Philadelphia. The convention was not referred to as a constitutional convention. It was contemporarily known as the Federal Convention, the Philadelphia Convention, or the Grand Convention at Philadelphia. Most delegates did not arrive intending to draft a new constitution. Many assumed that the convention's purpose was to discuss and draft improvements to the existing Articles of Confederation, and would not have agreed to participate otherwise. Once the convention began, however, most of the delegates – though not all – came to agree in general terms that the goal would be a new system of government, not simply a revised version of the Articles of Confederation.

The Articles of Confederation, officially the Articles of Confederation and Perpetual Union, was an agreement and early body of law in the Thirteen Colonies, which served as the nation's first frame of government during the American Revolution. It was debated by the Second Continental Congress at present-day Independence Hall in Philadelphia between July 1776 and November 1777, was finalized by the Congress on November 15, 1777, and came into force on March 1, 1781, after being ratified by all 13 colonial states.

A central and guiding principle of the Articles was the establishment and preservation of the independence and sovereignty of the original 13 states. The Articles consciously established a weak confederal government, affording it only those powers the former colonies recognized as belonging to the British Crown and Parliament during the colonial era. The document provided clearly written rules for how the states' league of friendship, known as the Perpetual Union, was to be organized.

The drafting of the Constitution of the United States began on May 25, 1787, when the Constitutional Convention met for the first time with a quorum at the Pennsylvania State House (now Independence Hall) in Philadelphia, Pennsylvania to revise the Articles of Confederation. It ended on September 17, 1787, the day the Frame of Government drafted by the convention's delegates to replace the Articles was adopted and signed. The ratification process for the Constitution began that day, and ended when the final state, Rhode Island, ratified it on May 29, 1790.

In addition to key events during the Constitutional Convention and afterward while the Constitution was put before the states for their ratification, this timeline includes important events that occurred during the run-up to the convention and during the nation's transition from government under the Articles of Confederation to government under the Constitution. It concludes with the unique ratification vote of the Vermont Republic, which at the time was a sovereign state outside the Union. The time span covered is 5 years, 9 months, from March 25, 1785 to January 10, 1791.

The Second Continental Congress (1775–1781) was the meeting of delegates from the Thirteen Colonies that united in support of the American Revolution and Revolutionary War, which established American independence from the British Empire. The Congress constituted a new federation that it first named the United Colonies of North America, and in 1776, renamed the United States of America. The Congress began convening in present-day Independence Hall in Philadelphia, on May 10, 1775, with representatives from 12 of the 13 colonies, following the Battles of Lexington and Concord, the first battles of the Revolutionary War, which were fought on April 19, 1775.

The Second Continental Congress succeeded the First Continental Congress, which met from September 5 to October 26, 1774, also in Philadelphia. The Second Congress functioned as the de facto federation government at the outset of the Revolutionary War by raising militias, directing strategy, appointing diplomats, and writing petitions such as the Declaration of the Causes and Necessity of Taking Up Arms and the Olive Branch Petition. All 13 colonies were represented by the time the Congress adopted the Lee Resolution, which declared independence from Great Britain on July 2, 1776, and the Congress unanimously agreed to the Declaration of Independence two days later.

The British Army during the American Revolutionary War served for eight years of armed conflict, fought in eastern North America, the Caribbean, and elsewhere from April 19, 1775 until the treaty ending the war, September 3, 1783. Britain had no European allies in the war, which was initially between Great Britain and American insurgents in the Thirteen Colonies. The war widened when the American insurgents made a formal alliance with France (1778) and gained the aid of France's ally Spain (1779).

In June 1775, the Second Continental Congress, gathered in present-day Independence Hall in the revolutionary capital of Philadelphia, appointed George Washington commander-in-chief of the Continental Army, which the Congress organized by uniting and organizing patriot militias into a single army under the command of Washington, who led it in its eight-year war against the British Army. The following year, in July 1776, the Second Continental Congress, representing the Thirteen Colonies, unanimously adopted the Declaration of Independence, an iconic and historical document largely written by Thomas Jefferson, addressed to King George III, which articulated why the delegates to the Congress felt were declaring themselves free and independent from the Kingdom of Great Britain. Adoption of the Declaration served to both inspire the cause of independence in the Thirteen Colonies and also formalized and escalated the Revolutionary War.