Proper adaptation and continuous evaluation of the operational environment were key factors contributing to the success of the US Marines during the Battle of Hue. However, even a successful tactical operation will not guarantee success at the operational and strategic level of the war. Indeed, they had successfully driven out the North Vietnamese Army (NVA) and Viet Cong (VC) forces after twenty-six days of bloody, arduous, and foreign urban warfare. However, US forces failed to maintain their legitimacy due to numerous weaknesses encountered during the battle, which ultimately led to the failure of the US strategic objective of containing the spread of communism in Southeast Asia. when the Tet Offensive began in the early morning of January 31, 1968. It happened in the third largest city in Vietnam, the city of Hue. Divided by the Perfume River, the city of Hue is actually made up of two distinct cities. One of these is the Citadel, built on the northern bank which extends for about eight square kilometers. It was the predominant cultural, spiritual and educational center of Vietnam. Militarily, the city was home to the headquarters of the 1st Infantry Division of the Army of the Republic of Vietnam (ARVN), as well as a complex for the Military Assistance Command of I Corps, Vietnam. An old saying goes that old men who seek to relive past glories control wars. The truth of this is nowhere more evident than in North Vietnam's great Tet Offensive of 1968. The Tet Offensive is part of phase two of the Communist Operational Plan: Tong Kong Kich-Tong Khoi Nghia (TCK-TKN), translated as General Offensive-General Revolt. This operational plan consists of three phases: Phase I was the series of exploratory attacks initiated by the NVA... middle of the paper... the type of battle they intend to undertake to execute the mission in the appropriate manner. tactics, techniques and procedures, therefore, reducing the number of victims by employing TTP by trial and error. Finally, there must be a single operational level commander present in the territory. US and ARVN units remained under separate chains for the duration of the fight. The lack of effective operational control in Hue led to haphazard and disjointed tactical actions. Ultimately, the US Marines won the Battle of Hue. They accomplished their mission of cleaning up the city and driving out its enemies. However, the United States has failed strategically. Their actions during combat caused the American public to lose faith in the Johnson administration's war effort, which ultimately led to the removal of U.S. forces in Vietnam, thus losing the war..