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".

Recent armed clashes between Cambodia and Thailand, the worst in over a decade, have spotlighted their military disparity. Thailand, with a $5.73 billion defence budget and 360,000 personnel, dwarfs Cambodia's $1.

Prior to a dramatic escalation of a long-running border row between Bangkok and Phnom Penh, footage showing the construction of a flood barrier in northern Thailand was shared in posts falsely claiming it depicted the kingdom's soldiers building a wall along its frontier with Cambodia.

Thailand’s military force is ranked 25th in the world and third in the ASEAN region after Indonesia and Vietnam. Thailand has 360,000 active troops, including 115,000 enlisted soldiers. In addition, there are 240,000 reserve troops and paramilitary forces, bringing the total number of military personnel to over 600,000.

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as their worst fighting in over a decade intensified and spread to new areas.

Thailand launched airstrikes against Cambodian forces along their disputed border after troops exchanged fire in a dramatic eruption of tensions between the two Southeast Asian neighbors. The Thai embassy in Cambodia warned its citizens to leave the country as soon as it was safely possible to do so.