Thao Thep Krasattri and Thao Si Sunthon
Thao" Thep Krasattri ( 1735 - 1792) and Thao" Si Sunthon (), formerly Khun Ying" Chan () and Khun Ying" Muk (), respectively, were the Thai national heroines who were known for their important roles in successful repelling of the Burmese Invasion of Thalang (modern Phuket) in 1786. "Khun Ying" Chan, or Lady Chan, was born by around 1735 and her younger sister Lady Muk was born around 1737 on the Thalang (Phuket) Island during the reign of King Borommokot of Ayutthaya. Their father was Chom Rang the local leader of Thalang Baan Khien. Their mother was a  Malay woman by the name of Masia. Masia, according to "Thalang Chronicles" composed in 1914, claimed descent from "Marhum" or a Sultan of Kedah. Masia moved from Kedah to Thalang where she met Chom Rang the local leader and married him. Three daughters and two sons were born from the union including Lady Chan and Lady Muk. In the eighteenth century, there were two major settlements on the Phuket Island; Thalang Baan Khien and Thalang Baan Don. Thalang Baan Khien was ruled by Chom Rang and Thalang Baan Don was ruled by Chom Thau. Chom Rang and Chom Thau were  half-brothers who shared the same father but different mothers. Lady Chan first married to "Muen" Si Phakdi, a minor local official. With him she had a daughter, Lady Prang, and a son, Thien. After "Meun" Si Phakdi had died, Lady Chan was remarried to "Phra" Phimol, the governor of Kraburi. With him she had another three daughters and two sons. Francis Light, a British merchant, arrived at Thalang in 1765 and became a close family friend to Lady Chan and "Phra" Phimol. After the Fall of Ayutthaya in 1767, Thalang came under the regime of "Chao Phraya" Nakhon Nu , who established himself as the ruler of Southern Thailand based on Nakhon Si Thammarat. King Taksin of Thonburi defeated Chao Phraya Nakhon Nu in 1769 and shortly after "Phra" Phimol, husband of Lady Chan, was made the governor of Thalang. Thongphun, a cousin of Lady Chan (who was the son of Chom Thau) was made the vice-governor of Thalang. In 1782, at the end of Thonburi Period, the new Bangkok court sent "Phraya" Thammatrailok as the new governor of Takua Pa and the surrounding vicinities. In 1785, during the Burmese–Siamese War of 1785–1786 or the Nine Armies' War , "Phraya" Thammatrailok ordered Lady Chan arrested for an unknown accusation for trial at Pak Phra. When Lady Chan had been taken to Pak Phra, the Burmese general Wungyi led a Burmese force of 3,000 men to attack Takua Pa. The Burmese took Takua Pa and Pak Phra and Phraya Thammatrailok was killed in battle. Lady Chan then, amidst confusion, returned to Thalang were she received warning from Francis Light about the imminent Burmese Invasion of Thalang. "Phra" Phimol, who had been grave ill, died in December 1785. This left Thalang without governor. The widowed Lady Chan and her sister Lady  Muk, together with her son Thien and her cousin Thongpun the vice-governor, organized the local defense against the Burmese invasion. They established themselves at Phra Nang Sang Temple and Thung Nang Dak and managed to be armed with two great canons. Francis Light also supported the Thalang defenders with arquebuses. The Burmese general Wungyi led the assault on the island. The defenders relied on their heavy canons to ward off the Burmese invaders. After about one month of continuous fighting, the Burmese finally retreated on March 13, 1786. Francis Light left Thalang for Penang Island in 1786, Even after  this, Francis Light and the family of Lady Chan maintained contacts through written letters. After the war, King Rama I appointed "Chao Phraya" Surinthraracha as the superintendent of the Andaman Coast and tin mining. "Chao Phraya" Surinthraracha brought the royal orders to reward Lady Chan and Lady Muk with the honorific title of "Thao", as "Thao" Thep Krasattri and "Thao" Si Sunthon, for their contributions to the successful defence of Thalang against the Burmese invaders. Thongpun was made the new governor of Thalang, while Thien, son of Lady Chan, was made "Phraya" Tukkaraj the vice-governor of Thalang. Lady Chan  and her family struggled to earn a living through tin mining. Lady Prang, daughter of Lady Chan, wrote to Francis Light in 1788 that her family was in the hardships. Thongpun and Thien then engaged in political conflicts. Lady Chan and her family traveled to Bangkok in 1788, where her son Nien became a royal page and her daughter Thong became a minor consort to King Rama I. Thien managed to file an accusation against Thongpun the governor of Thalang to the Bangkok court. Thongpun was then arrested and brought for trial at Bangkok where he died. Thien was made  the new governor of Thalang. Consort Thong, daughter of Lady Chan, born Princess Ubol in 1791. In 1792, "Phraya" Thalang Thien the governor of Thalang wrote a letter to Francis Light, stating that his mother Lady Chan had been old and ill and that his sister Lady Prang had already died. Lady Chan died in 1792. It is not known when Lady Muk died. Lady Chan's son, "Phraya" Thalang Thien, continued to govern Thalang until 1809 when the Burmese invaded again. Thalang fell to the Burmese in 1810 and was completely destroyed and Thien was taken as captive to  Burma. The "Heroine's Monument" honouring them is situated on the main highway (402) between the Phuket International Airport and Phuket town.