Dongmingan is located in the complex of Tan Trao Special National Monuments, once home to and working of the US special intelligence group with the code name "Con Nai" consisting of 5 members led by MajorAllison K.Thomas, who parachuted into the Tan Trao battlefield on July 16, 1945 to provide some weapons and training for the Viet Minh guards in the days before the uprising.
To facilitate communication and exchange with revolutionary cadres, the residence of the US intelligence group is only more than 60m from Na Nua camp, where President Ho Chi Minh lived and worked.
The appearance of the Dongming army group in Taos is a diplomatic effort and strategic vision of President Ho Chi Minh in identifying revolutionary opportunities as well as seizing the support of the outside world to prepare for the General Uprising to gain power.
Writer Dang Vuong Hung - author of the book "American attack in Vietnam" said that in October 1944 Lieutenant William Shaw fell in Cao Bang and thanks to the propaganda of the Viet Minh Front and the Vietnamese newspaper Doc Lap, the people saved the pilot and brought him to Pac Bo. President Ho Chi Minh took William Shaw to Kunming, China and suggested that the Dongming army recognize the Viet Minh Front as an anti-Psessional force.
After this, General Chennault sent personnel to support our young forces and this is also the only foreign force to support us in the August Revolution - according to writer Dang Vuong Hung.
In early August 1945, Viet Minh players and the Con Nai group set up training camps together. The group provided Viet Minh with some light weapons and directly trained guards using guns such as M1 Garand, M1 Carbine, M1/M1A1 Thompson, M1 Bazooka anti-tank guns, various types of machine guns and guards tactics.

According to historical documents, the cooperation between the Viet Minh guards and the US soldiers took place very smoothly. President Ho Chi Minh directed the selection of people from the Liberation Army units to organize a company called the Vietnam - US army. This unit is commanded by comrade Dam Quang Trung, Major Allison K.Thomas is the company commander.
On the afternoon of August 16, 1945, under the influence of the Newspaper, Commander-in-Chief Vo Nguyen Giap, on behalf of the National Uprising Committee, read the No. 1 Military Command and then led the army to attack and occupy Thai Nguyen town, then returned to Hanoi. The liberation army also included soldiers from the Con Nai group.
Prof. Dr. Pham Hong Tung - Hanoi National University - said that the General Uprising is a long-term preparation process. We have built the Vietnam - US military force, trained the military, but the most important thing is the Vietnam - US army as a testament to the Allied's international recognition of the Viet Minh Front's forces.
That is the vision, the talent of President Ho Chi Minh in international diplomatic efforts, combining the strength of the nation and the strength of the times to make the success of the August Revolution - Prof. Dr. Pham Hong Tung commented.
From Tan Trao "Resistance Capital" of the revolution, the wave of mass uprising spread like a waterfall, many localities across the country simultaneously stood up with the strength of a storm to chase off invaders and flood rafts with the wrong hands. On August 19, 1945, the uprising to gain power in Hanoi ended with resounding victory, creating motivation and enthusiasm for many other localities to gain power back to the people.