The Lee Resolution (also known as "The Resolution for Independence") was the formal assertion passed by the Second Continental Congress on July 2, 1776 which resolved that the Thirteen Colonies in America were "free and independent States", separated from the British Empire and creating what became the United States of America. News of this act was published that evening in The Pennsylvania Evening Post and the next day in the Pennsylvania Gazette. The Declaration of Independence is the formal document which officially announced and explained the resolution, approved two days later on July 4, 1776.

The resolution is named for Richard Henry Lee of Virginia who proposed it to Congress after receiving instructions and wording from the Fifth Virginia Convention and its President Edmund Pendleton. Lee's full resolution had three parts which were considered by Congress on June 7, 1776. Along with the independence issue, it also proposed to establish a plan for ensuing American foreign relations, and to prepare a plan of a confederation for the states to consider. Congress decided to address each of these three parts separately.

Some sources indicate that Lee used the language from the Virginia Convention's instructions almost verbatim. Voting was delayed for several weeks on the first part of the resolution while state support and legislative instruction for independence were consolidated, but the press of events forced the other less-discussed parts to proceed immediately. On June 10, Congress decided to form a committee to draft a declaration of independence in case the resolution should pass. On June 11, John Adams, Thomas Jefferson, Benjamin Franklin, Roger Sherman, and Robert R. Livingston were appointed as the Committee of Five to accomplish this. That same day, Congress decided to establish two other committees to develop the resolution's last two parts. The following day, another committee of five (John Dickinson, Benjamin Franklin, John Adams, Benjamin Harrison V, and Robert Morris) was established to prepare a plan of treaties to be proposed to foreign powers; a third committee was created, consisting of one member from each colony, to prepare a draft of a constitution for confederation of the states.

The committee appointed to prepare a plan of treaties made its first report on July 18, largely in the writing of John Adams. A limited printing of the document was authorized, and it was reviewed and amended by Congress over the next five weeks. On August 27, the amended plan of treaties was referred back to the committee to develop instructions concerning the amendments, and Richard Henry Lee and James Wilson were added to the committee. Two days later, the committee was empowered to prepare further instructions and report back to Congress. The formal version of the plan of treaties was adopted on September 17. On September 24, Congress approved negotiating instructions for commissioners to obtain a treaty with France, based on the template provided in the plan of treaties; the next day, Benjamin Franklin, Silas Deane, and Thomas Jefferson were elected commissioners to the court of France. Alliance with France was considered vital if the war with Britain was to be won and the newly declared country was to survive.

The committee drafting a plan of confederation was chaired by John Dickinson; they presented their initial results to Congress on July 12, 1776. Long debates followed on such issues as sovereignty, the exact powers to be given the confederate government, whether to have a judiciary, and voting procedures. The final draft of the Articles of Confederation was prepared during the summer of 1777 and approved by Congress for ratification by the individual states on November 15, 1777, after a year of debate. It continued in use from that time onward, although it was not ratified by all states until four years later on March 1, 1781.

The Second Continental Congress was a meeting of delegates from the Thirteen Colonies in America that united in the American Revolutionary War. It convened on May 10, 1775, with representatives from 12 of the colonies in Philadelphia, Pennsylvania, shortly after the Battles of Lexington and Concord, succeeding the First Continental Congress which met in Philadelphia from September 5 to October 26, 1774. The Second Congress functioned as a de facto national government at the outset of the Revolutionary War by raising armies, 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 thirteen colonies were represented by the time the Congress adopted the Lee Resolution which declared independence from Britain on July 2, 1776, and the congress agreed to the Declaration of Independence two days later.

Afterward, Congress functioned as the provisional government of the United States of America through March 1, 1781. During this period, its achievements included: Successfully managing the war effort; drafting the Articles of Confederation, the first U.S. constitution; securing diplomatic recognition and support from foreign nations; and resolving state land claims west of the Appalachian Mountains.

Many of the delegates who attended the Second Congress had also attended the First. They again elected Peyton Randolph to serve as President of the Congress and Charles Thomson to serve as secretary. Notable new arrivals included Benjamin Franklin of Pennsylvania and John Hancock of Massachusetts. Within two weeks, Randolph was summoned back to Virginia to preside over the House of Burgesses; Hancock succeeded him as president, and Thomas Jefferson replaced him in the Virginia delegation. The number of participating colonies also grew, as Georgia endorsed the Congress in July 1775 and adopted the continental ban on trade with Britain.