Reuters interviewed four people on both sides of the border to piece together the most detailed account of how the truce was achieved, including previously unreported Thai conditions for joining the talks and the extent of Chinese involvement in the process.

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.