By Devjyot Ghoshal, Francesco Guarascio and Poppy McPherson (Reuters) -When weeks of tensions escalated into a major border conflict with Thailand last week, former Cambodian Prime Minister Hun Sen appeared to take charge of his country's response.

The fragile ceasefire between Thailand and Cambodia is hanging by a thread. Despite a Malaysia-brokered deal backed by the U.S. and China, tensions remain high. Thailand is holding nearly 20 Cambodian soldiers it claims were captured during a failed assault,

Thai-Cambodian border clashes, ceasefire, historical roots, nationalist sentiments, and territorial disputes explained in a complex geopolitical landscape.