Outey Reachea III

Outey Reachea III ឧទ័យរាជាទី៣
King of Cambodia
Reign	1775 – 1779
Coronation	1775
Predecessor	Noreay Reachea I
Successor	Reamea Thipadei III
Born	No record
Died	1779 Oudong
Issue	No record
Names Preah Bath Samdach Preah Outey Reachea Thireach Reamea Thipadei
House	List of monarchs of Cambodia
Father	Outey Reachea II
Religion	Buddhism Theravada

Outey Reachea III or Ang Norn (Khmer: ឧទ័យរាជាទី៣), ឬ (Khmer: អង្គណន) was the Cambodian king ruled from 1775 to 1779. After the official coronation ceremony in Oudong in 2319 BE, 1775 AD, Maha Sakarach 1698, His full name was called "Preah Bath Samdach Preah Outey Reachea Thireach Reamea Thipadei" He was the son of Outey Reachea II, who ascended the throne in a military coup and also assassinated King Noreay Reachea I. 

Cambodia cuts two provinces to Annam, 1776

Outey Reachea III, after a successful military coup to overthrow King Noreay Reachea I with the support of the Annamites, cut off two provinces of Cambodia to a new Annamite king named "Thay Duc" Founder of the Tay Son Movement, is a group formed by the "Three Trinh" clan, the Manchu Chinese of southern Dai Viet, who have a culture almost identical to that of the Chinese, that revolted from the Annam king of Hue city in 1771 and occupied the whole of Annam in 1774 AD. Due to the one-Vietnam policy, the history of the current Vietnamese society has been rewritten to eliminate the Annamites, just as the current Thai history seeks to eliminate the Mon-Khmer people. Two of Cambodia's provinces bordering Annam were Phsar Dek (Dong Thap) and Chau Doc (An Giang), which were officially annexed to Annam in 1776 AD.

Siam invaded Cambodia, 1778 AD

A new Annamite emperor named Thay Duc, who overthrew the Hue emperor Nguyễn Phúc Dương in 1774 AD and proclaimed the Vietnamese emperor Dai Viet in 1778 AD and completely transformed Annamite society by incorporating Chinese culture into Annamite society, Thus, Cambodia no longer called Annam, changing the name of the "Yuon" from then on by the word "Yuon", which means nation from the north of Tonkin. In 1778, the Siamese king Phya Taksin, raised 20,000 troops to invade Cambodia, dividing it into two divisions, the first division, 10,000 troops, across from the Laos, and 10,000 troops Second Division of the navy up the lower Mekong River, Siam Raises Troops turn traces to Prepare for Large-Scale Invasion of Oudong city, Outey Reachea III, he ordered the artillery of the four direction units to grind ammunition and cut down trees to build fortifications in Phnom Penh and in Muk Kampoul district, Kandal province, in preparation for the battle with Siamese army. The war broke out with Cambodia, with the help of Yuon Dai Viet and well-prepared, causing the Siamese side to fail and retreat. The Siamese king Phya Taksin, angry with Cambodia and Yuon Dai Viet, that is, at the last month of 1778, the Siamese raised 60,000 troops to invade Cambodia again, Cambodia king also sent a message to the Yuon Dai Viet army. To resist the Siamese army, but no response from the Yuon Dai Viet because Annamites are rebelling. Therefore, Cambodia king also ordered general Chao Fa Mo to raise 50,000 troops against the Siamese army, This battle caused a massacre on Cambodian territory. In many areas it was quiet, in some districts only the elderly and young children, the rest of the Siamese army mobilized the people, Thousands of Cambodian families were forcibly taken to Siam, and the Siamese army looted the people's valuable property. The Annamites, on the other hand, took this opportunity to send more and more of their people to settle in the Khmer Kampuchea Krom territory, The suffering of the people, so Chao Fa Mo was very sad and he agreed to form an alliance with Siam. To end this tragedy, he assassinated King Outey Reachea III in 1779 AD, and he asked the Siamese king, take Ang Eng, the son of King Chey Chestha IV, to ascend the throne to be King of Cambodia and he took the position of Grand Viceroy. Ang Eng took the royal name of Preah Bath Samdach Preah Reach Angkar Preah Ream Reachea Thipadei, which was identified by the group of Cambodian historians as Reamea Thipadei III.