Historical Background Leading to War
In late 1788, Vietnam's political situation was extremely complex. In the north, King Le Chieu Thong, seeking to reclaim the throne from the Tay Son, appealed to the Qing dynasty (China) for help. Seizing this opportunity, the Qing dispatched a massive invading force of up to 290,000 troops under the command of Governor-General Sun Shiyi, marching under the pretext of 'restoring the Le and destroying the Tay Son.'
Facing this critical situation, in Phu Xuan (Hue), Nguyen Hue decided to ascend the throne on the 25th day of the 11th month of the Mau Than year (1788), taking the reign title Quang Trung. This hurried enthronement was not only to legitimize power but, more importantly, to unify leadership and establish a proper mandate to rally the entire nation against the invaders. Immediately after, he launched a lightning march north, one of the fastest and boldest campaigns in Vietnamese military history.
Nguyen Hue Ascends the Throne and the Lightning March
'Heart Attack' Strategy and Lightning March
More than a mere troop movement, Quang Trung's march was a meticulous political and psychological campaign. En route north, he stopped at Nghe An to recruit more soldiers and consolidate forces. There, he delivered a brief yet powerful exhortation that boosted morale, stirred national pride, and ignited a will to fight. The swift recruitment demonstrated the immense prestige and appeal of the 'cloth-clad hero' to the people.
A key detail showing political acumen was Quang Trung's military review and flag-offering ceremony at Nghe An, vowing to crush the invaders. He understood that to defeat a vast army, one must first win the psychological battle. The march from Phu Xuan to Thang Long took about a month, an astonishing speed for the era, reflecting determination and exceptional organizational skill.
Plan for the General Offensive During Tet Ky Dau
The crux of Quang Trung's victory was his brilliant choice of timing. He judged the Qing troops as overconfident and likely to be absorbed in celebrating the Lunar New Year. Choosing the New Year's Eve and the morning of the 5th of Tet for a general offensive was a devastating psychological blow, catching the enemy completely off guard and disabling their ability to mount a coordinated defense.
As predicted, on the night of the 30th of the last month of Mau Than, Tay Son forces began their attack. They advanced in multiple columns, encircling and striking key enemy positions. The smooth coordination among units and the bold, swift tactics left the Qing forces completely passive.
The Ngoc Hoi - Dong Da Campaign
The Pivotal Battle at Ngoc Hoi Fort
Ngoc Hoi Fort (now in Thanh Tri district, Hanoi) was one of the most formidable Qing defensive strongholds south of Thang Long. The Qing built a dense system of ramparts, deep moats, bamboo spikes, and high earthworks, creating what they believed was an impregnable line.
Early on the 5th of Tet Ky Dau (January 30, 1789), Quang Trung personally led the main force against Ngoc Hoi. To breach the defenses, he had soldiers use large wooden planks wrapped in wet straw as shields, enabling infantry to advance. This unique innovation neutralized enemy fire and effectively filled moats and breached ramparts.
The battle at Ngoc Hoi was ferocious. The Tay Son soldiers fought with blazing spirit, 'charging forward in unison', wiping out nearly all defenders. Capturing Ngoc Hoi was a decisive turning point, shattering the Qing's key southern defense line and opening the gateway to Thang Long.
The Dong Da Battle and the Qing Collapse
Simultaneously with Ngoc Hoi, another Tay Son force, led by commanders such as Do Doc Long and Do Doc Tuyet (historical records indicate Quang Trung led the main force at Ngoc Hoi), fiercely attacked Dong Da Fort (now in Dong Da district, Hanoi). The enemy general Sam Nghi Dong, defending the fort, panicked at the storm-like assault and hanged himself in desperation.
After taking both major forts, the path into Thang Long was nearly open. The Tay Son forces pressed rapidly into the city. Sun Shiyi, upon hearing of the defeat, fled in panic, crossing the Nhi River (Red River) by pontoon bridge with his retinue. The Qing retreat was chaotic, with heavy casualties and many drowning in the river.
Reasons for Victory and Historical Significance
Strategic Genius and Vision of the Leader
The Ngoc Hoi - Dong Da victory is among the most brilliant feats in Vietnam's history of resisting foreign invasion. It stemmed from many factors, most notably Emperor Quang Trung's strategic brilliance, vision, and organizational skills. He made bold, precise decisions on timing, location, and tactics, turning disadvantages into advantages.
Equally important was the wholehearted support of the people. From recruiting soldiers and supplying food to providing intelligence about the enemy, the people of Bac Ha contributed immensely to the success. This shows the war was not just the Tay Son cause but a national endeavor, reflecting the tradition of patriotism and unity against invaders.
A Glorious Milestone in National History
The victory crushed the Qing invasion scheme and firmly protected national independence and sovereignty. It stands as a shining milestone, affirming the strength and resilience of the Vietnamese people against any invader, however powerful. It also marked the maturation of the Tay Son movement from a peasant uprising into a dynasty capable of shouldering national responsibility.
Militarily, the victory offers invaluable lessons in the art of war, combining timing, speed, secrecy, and fighting spirit. The surprise attack during Tet, clever use of obstacles, and coordinated combined-arms tactics are unique contributions by Quang Trung to Vietnam's military heritage.
Commemorating Quang Trung through the Dong Da Mound Festival
Every year on the 5th day of Lunar New Year, people nationwide, especially Hanoi residents, flock to the special national relic site of Dong Da Mound (Dong Da district, Hanoi) for the Dong Da Mound Festival. The festival not only honors the great deeds of the cloth-clad hero Quang Trung - Nguyen Hue and the Tay Son generals and soldiers but also educates younger generations on patriotism and national pride.
The festival lasts several days, featuring solemn rituals such as palanquin processions, offerings, incense ceremonies, and cultural activities and folk games. In the sacred spring atmosphere, locals and visitors offer incense, pray for national peace, and recall the nation's heroic history. The stone stele inscribed with Quang Trung's words when ordering the march north serves as an important historical reminder.
In 2025, the festival commemorates the 236th anniversary of the Ngoc Hoi - Dong Da victory (1789-2025) on a large scale, including a special art program with 3D mapping and fireworks, broadcast live. This reflects today's respect for history and the aspiration to preserve and promote the nation's cultural and historical values in the modern era.
