The Continental Army consisted of soldiers from all 13 colonies and, after 1776, from all 13 states. When the American Revolutionary War began at the Battles of Lexington and Concord on April 19, 1775, the colonial revolutionaries did not have an army. Previously, each colony had relied upon the militia, made up of part-time citizen-soldiers, for local defense, or the raising of temporary "provincial regiments" during specific crises such as the French and Indian War of 1754–63. As tensions with Great Britain increased in the years leading to the war, colonists began to reform their militias in preparation for the perceived potential conflict. Training of militiamen increased after the passage of the Intolerable Acts in 1774. Colonists such as Richard Henry Lee proposed forming a national militia force, but the First Continental Congress rejected the idea.
On April 23, 1775, the Massachusetts Provincial Congress authorized the raising of a colonial army consisting of 26 company regiments. New Hampshire, Rhode Island, and Connecticut soon raised similar but smaller forces. On June 14, 1775, the Second Continental Congress decided to proceed with the establishment of a Continental Army for purposes of common defense, adopting the forces already in place outside Boston (22,000 troops) and New York (5,000). It also raised the first ten companies of Continental troops on a one-year enlistment, riflemen from Pennsylvania, Maryland, Delaware and Virginia to be used as light infantry, who became the 1st Continental Regiment in 1776.
On June 15, 1775, the Congress elected by unanimous vote George Washington as Commander-in-Chief, who accepted and served throughout the war without any compensation except for reimbursement of expenses.
On July 18, 1775, the Congress requested all colonies form militia companies from "all able bodied effective men, between sixteen and fifty years of age." It was not uncommon for men younger than sixteen to enlist as most colonies had no requirement of parental consent for those under twenty-one (adulthood).
Four major-generals (Artemas Ward, Charles Lee, Philip Schuyler, and Israel Putnam) and eight brigadier-generals (Seth Pomeroy, Richard Montgomery, David Wooster, William Heath, Joseph Spencer, John Thomas, John Sullivan, and Nathanael Greene) were appointed by the Second Continental Congress in the course of a few days. After Pomeroy did not accept, John Thomas was appointed in his place.
General George Washington
was appointed Commander-in-Chief of the Continental Army on June 15, 1775.
As the Continental Congress increasingly adopted the responsibilities and posture of a legislature for a sovereign state, the role of the Continental Army became the subject of considerable debate. Some Americans had a general aversion to maintaining a standing army; but on the other hand the requirements of the war against the British required the discipline and organization of a modern military. As a result, the army went through several distinct phases, characterized by official dissolution and reorganization of units.
Soldiers in the Continental Army were citizens who had volunteered to serve in the army (but were paid), and at various times during the war, standard enlistment periods lasted from one to three years. Early in the war the enlistment periods were short, as the Continental Congress feared the possibility of the Continental Army evolving into a permanent army. The army never numbered more than 17,000 men. Turnover proved a constant problem, particularly in the winter of 1776–77, and longer enlistments were approved. Broadly speaking, Continental forces consisted of several successive armies, or establishments:
- The Continental Army of 1775, comprising the initial New England Army, organized by Washington into three divisions, six brigades, and 38 regiments. Major General Philip Schuyler's ten regiments in New York were sent to invade Canada.
- The Continental Army of 1776, reorganized after the initial enlistment period of the soldiers in the 1775 army had expired. Washington had submitted recommendations to the Continental Congress almost immediately after he had accepted the position of Commander-in-Chief, but the Congress took time to consider and implement these. Despite attempts to broaden the recruiting base beyond New England, the 1776 army remained skewed toward the Northeast both in terms of its composition and of its geographical focus. This army consisted of 36 regiments, most standardized to a single battalion of 768 men strong and formed into eight companies, with a rank-and-file strength of 640.
- The Continental Army of 1777–80 evolved out of several critical reforms and political decisions that came about when it became apparent that the British were sending massive forces to put an end to the American Revolution. The Continental Congress passed the "Eighty-eight Battalion Resolve", ordering each state to contribute one-battalion regiments in proportion to their population, and Washington subsequently received authority to raise an additional 16 battalions. Enlistment terms extended to three years or to "the length of the war" to avoid the year-end crises that depleted forces (including the notable near-collapse of the army at the end of 1776, which could have ended the war in a Continental, or American, loss by forfeit).
- The Continental Army of 1781–82 saw the greatest crisis on the American side in the war. Congress was bankrupt, making it very difficult to replenish the soldiers whose three-year terms had expired. Popular support for the war reached an all-time low, and Washington had to put down mutinies both in the Pennsylvania Line and in the New Jersey Line. Congress voted to cut funding for the Army, but Washington managed nevertheless to secure important strategic victories.
- The Continental Army of 1783–84 was succeeded by the United States Army, which persists to this day. As peace was restored with the British, most of the regiments were disbanded in an orderly fashion, though several had already been diminished.
In addition to the Continental Army regulars, local militia units, raised and funded by individual colonies/states, participated in battles throughout the war. Sometimes the militia units operated independently of the Continental Army, but often local militias were called out to support and augment the Continental Army regulars during campaigns. (The militia troops developed a reputation for being prone to premature retreats, a fact that Brigadier-General Daniel Morgan integrated into his strategy at the Battle of Cowpens in 1781.)
The financial responsibility for providing pay, food, shelter, clothing, arms, and other equipment to specific units was assigned to states as part of the establishment of these units. States differed in how well they lived up to these obligations. There were constant funding issues and morale problems as the war continued. This led to the army offering low pay, often rotten food, hard work, cold, heat, poor clothing and shelter, harsh discipline, and a high chance of becoming a casualty.