The Tây Sơn uprising was a significant movement in Vietnamese history that began in the late 18th century. By early 1789, the Tây Sơn forces, with their leader Nguyễn Huệ, had rallied numerous supporters against the Qing dynasty's encroachments. The Qing had invaded Vietnam, seeking to re-establish control after a brief period of instability following the decline of the Lê dynasty. The battle for Thăng Long (modern-day Hanoi) became a pivotal moment of conflict. Nguyễn Huệ, known for his tactical genius, launched a surprise attack during the Tết festival, catching the Qing forces off guard. The nature of the battle and its timing leveraged the element of surprise effectively, allowing the Tây Sơn to exploit weaknesses in the Qing's defenses. As a result, the Tây Sơn forces engaged in a fierce confrontation that ultimately led to the successful expulsion of the Qing troops from the city.After the victory, Nguyễn Huệ was hailed as a national hero. His leadership galvanized the people of Vietnam, instilling a sense of pride and unity that would shape the country's resistance against foreign rule for generations. Furthermore, this victory rekindled hopes for independence among the Vietnamese against external threats and laid down the groundwork for the eventual establishment of the Nguyễn dynasty, which would last until the French colonization of Vietnam in the mid-19th century. The liberation of Thăng Long allowed the Tây Sơn to consolidate control, allowing them to focus more extensively on governing and reforming the nation. The success asserted the capability of local forces to oppose and overcome foreign invaders, prompting further resistance movements in the region.