The war centered on the control of the Phuket Island, also known as Thalang or Junk Ceylon, and the tin rich Andaman Coast.

[3] This occasion was the last[1] Burmese offensive expedition into Siamese territories in Thai history, with British acquisition of the Tenasserim Coast in 1826, following the First Anglo-Burmese War, removing several hundred miles of the existing land border between Siam and Burma.

The war also left Phuket devastated and depopulated for many decades until its reemergence as a tin mining center in the late 19th century.

Large swathes of central Mainland Southeast Asia experienced severe depopulation as a result of the 50 year conflict.

[7] Thakin Mongmu[1] the governor of Martaban then petitioned to the Burmese king that the campaign could not be carried on because of Atwinwun's mismanagement and Burma had better maintain peaceful relations with Siam.

However, Atwinwun pleaded to the king that the resources were already invested on the prospective campaign[7] and he should at least dispatch the expedition on the Andaman Coast.

King Rama II also appointed his younger brother as Prince Maha Senanurak of the Front Palace.

In October 1809,[1] Atwinwun, who stayed at Tavoy, arranged for the Burmese navy forces with total number of 7,000 men[7] to invade Siam; totally 4,000 men to invade Southern Siam and Andaman Coast The Siamese speculated the invasion route crossing the Tenasserim Hills and through Chumphon and Phetchaburi to Bangkok.

From Takua Pa, the Burmese fleet disembarked and marched by land to Pak Phra (modern Phang Nga).

At Sakhu, Zeya Thuriya Kyaw defeated a small Siamese regiment and proceeded to Ban Takhien in the central plains.

The Siamese relief forces under Chaophraya Yommaraj Noi reached Nakhon Si Thammarat in November 1809.

Facing two-pronged attacks, Phraya Thalang Thien was unable to assembly forces in time and was left with few garrisons in the citadel.

The Siamese generals - Yommaraj Noi at Trang and Phraya Thotsayotha at Pak Phra - faced a major problem.

Nga Chan sent a letter[1] to Norman Macalister the governor of Prince of Wales Island to declare his victory and assured his peaceful intentions towards the British East India Company.

Nakhon Phat had his adoptive son Phra Borrirak Phubetr,[7] together with the Kedahan Laksamana, lead the combined Siamese-Malay fleet to attack the Burmese at Phuket.

Nga Chan the Burmese commander, upon hearing the sounds of the winds, thought that a massive Siamese army was coming and decided to retreat and abandon Thalang.

For their failures, Atwinwun at Tavoy ordered the executions of Nga Chan and Thuriya Thaya Kyaw the Burmese commanders.

King Bodawpaya, upon learning of Atwinwun's severe punishment of his subordinates, sent Toya Bo to Tavoy to carry out the royal orders to release the imprisoned generals.

The Burmese at Thalang was in dire conditions as the ruinous island did not provide much supplies and they ran out of food resources.

Sibo Wun sent Zeya Thuriya Kyaw, the disgraced commander of the previous campaign, to sail a boat to buy rice rations at Mergui.

In December 1809, Atwinwun commanded Thuriya Thaya Kyaw to lead the Burmese army crossing the Tenasserim Hills to attack Chumphon.

[1] Later in March 1810, when the Burmese were defeated at Thalang, Atwinwin ordered Thuriya Thaya Kyaw to be executed for his failures along with Nga Chan.

Just fourteen years later, Burma would be embroiled in a large-scale war with the British over Assam, from which the Burmese would lose the Tenasserim Coast.