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Legion of the United States

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Through American Revolutionary War

The Legion was primarily formed in reaction to multiple defeats in the Ohio country in 1790 and 1791 and to assert U.S. sovereignty over U.S. borders in the western territories and Great Lakes regions. The Legion comprised four sub-legions, each with infantry, cavalry, riflemen, and artillery. The Legion is best known for its victory at the Battle of Fallen Timbers in August 1794. Following the 1795 Treaty of Greenville with the Western Confederacy of Native American nations and the Jay Treaty with Great Britain, the Legion was reduced in size and rechristened the Army of the United States in 1796.

The modern 1st, 3rd, and 4th United States Infantry Regiments of the United States Army trace their lineage to the Legion of the United States.

Origins

After the American Revolutionary War in 1783, Congress decided to disband the Continental Army. By 1784, all Continental Army regiments had been disbanded, and the new United States Army consisted of two detachments to guard military supplies. By 1785, however, a cash-strapped Congress authorized 700 recruits to form the First American Regiment, which served in the Western territories, both to expel illegal settlers and to protect those who had purchased their lands from the United States. Many in the nascent United States still feared a standing army at this time, so the U.S. relied primarily on volunteer state militias.

A new government under the United States Constitution created the Department of War in 1789 and named Henry Knox as the first secretary. While Knox worked to organize the new department, he ordered the First American Regiment commander, Lieutenant Colonel Josiah Harmar, to lead an offensive against "banditti" Native Americans in the Northwest Territory. Harmar's force consisted of about 300 federal regulars and 1,000 militia, and suffered from a lack of equipment and provisions. The Harmar Campaign departed Fort Washington in September 1790 and marched to Kekionga, where they were defeated with heavy losses.

Washington ordered a follow-up expedition led by territorial governor, General Arthur St. Clair. His initial force was roughly the same size as Harmar's, so Congress authorized a second infantry regiment of 2,000 soldiers, but only for six months. St. Clair's total force was only 2,400, and he could not overcome logistics problems, but with the six-month levies expiring, he set out in September 1791. This newly recruited and inexperienced force was attacked in camp on the morning of 4 November 1791 by forces of the Western Confederacy led by Little Turtle and Blue Jacket. St. Clair's defeat remains one of the worst in U.S. Army history, with over half of St. Clair's combined force killed or wounded. Three-quarters of the new Second Infantry Regiment, including their commander Richard Butler, were lost, as was all artillery.

The defeat of Harmar and St. Clair caused a shift in thinking. Congress recognized that it needed a more significant, professional army, and authorized a federal force strength of 5,190. President George Washington drafted a list of sixteen general officers from the American Revolutionary War to lead an expanded Army in the Northwest, including Benjamin Lincoln, Daniel Morgan, and Friedrich Wilhelm von Steuben. After consulting with his cabinet, he picked Anthony Wayne to lead the new professional army, although Washington initially considered him too vain. Influenced by treatises from both Henry Bouquet and General Friedrich Wilhelm von Steuben, and at the recommendation of Secretary of War Henry Knox and General von Steuben, it was decided to recruit and train a "Legion", a force that would combine all land combat arms of the day (cavalry, heavy and light infantry, artillery) into one efficient brigade-sized force divisible into stand-alone combined arms teams. Congress agreed with this proposal to augment the small standing army until "the United States shall be at peace with the Indian tribes." Congress also passed the Militia Acts of 1792, giving President Washington authority over state militias in a national emergency.

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