While American forces had been stationed in the Republic of Vietnam since 1959, in intelligence & advising/training roles, they did not deploy in large numbers until 1965, after the Gulf of Tonkin Incident. military as a whole) did not lose a sizable battle.
American forces effectively established and maintained control of the "traditional" battlefield, however they struggled to counter the guerrilla hit and run tactics of the communist Viet Cong and the North Vietnamese Army. During the 1960s the Department of Defense continued to scrutinize the reserve forces and to question the number of divisions and brigades as well as the redundancy of maintaining two reserve components, the Army National Guard and the Army Reserve.
Based on 1860 census figures, 8% of all white males aged 13 to 43 died in the war, including 6% in the North and 18% in the South. With the outbreak of the Korean War, concerns over the defense of Western Europe rose. troops remained stationed in West Germany, with others in Belgium, the Netherlands and the United Kingdom, until the 1990s in anticipation of a possible Soviet attack.
Washington led victories against the British at Trenton and Princeton, but lost a series of battles around New York City in 1776 and Philadelphia in 1777.
With a decisive victory at Yorktown, and the help of the French, the Continental Army prevailed against the British.
Per the treaty both sides returned to the status quo with no victor.
The army's major campaign against the Indians was fought in Florida against Seminoles.
The army was initially led by men who had served in the British Army or colonial militias and who brought much of British military heritage with them.