After Bangkok rejected what it called the "baseless accusation" it had used chemical weapons over Cambodia during the Southeast Asian neighbours' bloodiest military clashes in decades, a months-old photo resurfaced in posts falsely claiming it showed the Thai air force using a "poisonous smoke weapon".

The tank screeches as it rolls into the ad-hoc military base before four battle-weary soldiers jump out to re-inspect the hefty vehicle.

U.S.-backed talks to end the border war, in which militaries have killed dozens of people and displaced hundreds of thousands, began on Monday in Malaysia.

A ceasefire between Thailand and Cambodia held on Monday and military commanders from both sides met to discuss measures to maintain the truce, as some residents along the disputed frontier trickled back home after five days of intense fighting.

Long-festering tensions over border territory have escalated into armed conflict between Cambodia and Thailand, leading to dozens of deaths on both sides and displacing tens of thousands of people

President Donald Trump is championing himself as an expert in conflict resolution after helping successfully negotiate peace between Thailand and Cambodia. The president boasted about his accomplishment Monday while speaking to reporters in Scotland alongside U.