Tran Nguyen Han (Chinese character: 陳 元 扞, 1390 - 1429) was a Dai Viet military during the early Le dynasty. He was a member of the Tran lineage, prominent with his participation in the Le Son uprising led by Le Loi against the colonization of the Ming empire. He used to hold the post (1424-1425), Thai lieutenant (1427), commanded the battles to liberate Tan Binh and Thuan Hoa (1425-1426), besieged Dongguan, destroyed Xuong Giang and blocked the way. of the Ming army in Chi Lang-Xuong Giang campaign (1427). Uprising the victory, Le Loi ascended to the throne as Emperor, Thai Le Le (1428). Trần Nguyên Hãn was promoted to the rank of Ta minister. But later because of suspicion, Thai To accuse him of causing him to commit suicide. During the reign of Emperor Le Nhan Tong, he was pardoned and restored to his position.
According to the popular Dai Viet book, Tran Nguyen Han of Lap Thach district, descendants of Tran Nguyen Dan Diagram, was well-educated and skilled in military tactics.
Pham Dinh Ho and Nguyen Phe in the book of Funeral Mourning, Tran Trong Kim in Vietnamese history and Phan Ke Binh all said that Tran Nguyen Han was from Hoac Xa, Quang Oai and Son Tay districts (now in Ba district. Vi, Hà Nội). Tran Xuan Sinh rejected the idea. He said that he had been to Huo Xa commune (also known as Van Xa), but that the villagers worshiped Tran Khat Chan and that they - they knew nothing about Tran Nguyen Han. From the above argument, this author thinks that Tran Trong Kim in Vietnam has a history and Phan Ke Binh based on the tangent of random love.
The Dai Viet Book of History writes that he: Well-educated, well-trained, and a descendant of Tran Tran Dan. Trần Nguyên Đán was the Tran Dynasty's king, who was a mandarin of Tu Do. He sent his son to Hồ Quý Ly, so when Hồ Quý Ly robbed Trần's family, the Trần family was killed, and only the children of Hồ Lý could live. In his lifetime, Tran Thuc Giao and Tran Thuc Quynh surrendered, acted as puppet officers for the Ming dynasty, and were killed by the Hau Tran dynasty along with 500 people, not knowing whose descendants Tran Nguyen Han was. 
The Dai Viet Book of History states that: When the Ho Dynasty died, the Ming army invaded, hundreds of them mourned, Tran Nguyen Han raised the will to save lives. One day, when he came to worship at Bach Hac temple, he saw the god at Tan Vien mountain temple and told the god at Bach Hac temple that heaven had sent Le Loi, the person from Lam Son to be King of An Nam. That's why he came to Thanh Hoa to look for Le Loi, and followed along. Le Loi knew his strategy, treated very well, for attending the intrigue, according to the invaders. In the Year of the Rat (1425), he was ordered by Le Loi and his Lieutenant General Le No to obey Le Da Bo's orders to bring more than 1,000 troops and an elephant to attack the lands of Tan Binh and Thuan Hoa (i.e. provinces from Quang Binh). to Thua Thien-Hue today).
Attacking Tan Binh and Thuan Hoa
In the year of the Year of the Snake (1425), in the autumn of July, Le Loi judged that the Ming army in Thuan Hoa and Tan Binh lands had long been not informed to Nghe An and Dong Do, telling the generals: The general good at the old days, leaving the snake to fight against the blankets, avoiding strong areas to fight against weak spots, thus using only half the strength and doubling the effort. Immediately he and Lieutenant General Le No, obeyed Le Da Bo's order to bring more than 1,000 troops and an elephant to attack the lands of Tan Binh and Thuan Hoa.
When the uprising army reached Bo Chinh river, they met the Minh army. Tran Nguyen Han, Le No and Le Da Bo put their troops in a dangerous place, secretly ambushed in Ha Khuong to lure the enemy. General Minh was Nham Nang who brought all his troops, he and Doan No, Le Da Bo combined the remaining troops to fight and then pretended to lose. Nham Nang pursued, the ambush army fought the two sides, the Minh army was broken, severed and drowned a lot.
Despite the victory, his and Doan Noi's troops were few, and the Minh army was still large. Le Loi ordered Le Ngan, Le Boi and Le Van An to bring 70 warships to cross the sea. Having been convinced to win the previous battle, he immediately won in Tan Binh and Thuan Hoa lands. The army and people of the localities occupied by the Ming army all agreed, the Ming army retreated into the stronghold. The lands of Tân Bình and Thuận Hóa belong to the insurgents.
In September, the year of the Year of the Horse (1426), Le Loi received a message from Dinh Le on the victory of Good Dong, Chuc Dong and immediately sent his troops to the North.Dong Do army. Le Loi divided his army into 3 wings, on October 23, sent Tran Nguyen Han and Bui Du to bring more than a hundred naval boats, up the Dai Lung river to the mouth of the Hat River, then smoothly downstream to the East wharf at the beginning of Lo River; wrong Dinh Le brought more than 1 thousand secret troops to the Tay Duong bridge; Le Loi personally led the soldiers to the South gate outside Dai La citadel to attack Dong Quan citadel. At night, on the third guard, 3-sided troops attacked and set fire to houses outside the city, smoke and sky filled with smoke. The troops stationed outside the city of Phuong Chinh scrambled to run into the door of the dead body. The Lam Son army forced all of the people in the country to follow the Ming army and more than a hundred warships and many weapons and scepteres. The Ming army knew that the militia and army in the nearby areas were following the insurgency. Every day, they became more and more miserable.
In the fall, September, the year of Dinh Mui, Tran Nguyen Han was made a Thai lieutenant. Le Loi ordered Thai Lieutenant Tran Nguyen Han, Sima Le Sat, and Lieutenant Ly Trien and Nguyen Ly to attack Xuong Giang.
The leader of the Ming dynasty, Kim Dian, kept this citadel to protect the Ming army's way to retreat to the North, along with the newly admitted Ly Nham, trying to defend. The insurgency surrounded for more than 6 months, fighting in Khoai Chau and Lang Giang. The insurgents could not go to the citadel, Le Loi saw that the Minh army reinforcements were coming, and they sent new generals, including Tran Nguyen Han, to rush out the army. underground tunnel, using interconnection, spear, hard crossbow, rocket, artillery, four sides hit together, less than an hour was defeated. Li Ren and Jin Yan committed suicide. The inscription collected gold and silk, and the daughter divided the soldiers equally. Vuong Thong heard that the losing match had to be a sacrifice.
Participated in defeating the Ming reinforcements
On September 18, Dinh Mui (1427), the two armies of the Ming army led by An Vien, Lieu Thang, entered Lang Son and the feudal state of Moc Thanh at Le Hoa gate    Days. 20, the army led by Lieu Thang was attacked by Le Sat, Luu Nhan Chu, Tran Luu, Le Lanh, Dinh Liet, Le Thu, who attacked in Chi Lang, Lieu Thang was slashed at Ma Yen mountain. After a series of failures and a number of marshals died, Cui Tu, Hoang Phuc led the army, but were surrounded by Le Ly and Le Van An with 30,000 troops, and erected fences at the left bank of Xuong Giang river. block out
Meanwhile, Le Loi ordered Tran Nguyen Han to block the transportation of Minh army food. In early November, the general Lam Son army attacked, the Minh army was defeated, killed and captured alive with the generals
This oath - which later history books called the Dongguan oath - took place in December 1427 in the south of the city, on the banks of the Cai River. In the list of participants of the festival of Lam Son, Tran Nguyen Han was second, after Le Loi
Position and reward
Around 1424-1425, Tran Nguyen Han was a scholar. In 1427, after the war of conquering Dongguan, he was made a Thai lieutenant
Dai Viet used to sign the whole letter in chapter X, writing "General Assembly of martial generals and officers to assert, reward, consider high and low merits and rank hierarchy. Take the excess of Nguyen Trai as a subordinate of the army; cadet Tran Han as the Lieutenant General, the secret area of ambassador Pham Van Xao as Thai Bao