The agreement is a significant breakthrough to resolve five days of deadly border clashes that have killed dozens and displaced tens of thousands.

Preliminary talks between Thailand and Cambodia defense officials started on Monday in Malaysia ahead of a key ministerial level meeting on Thursday, as a fragile truce continues to hold a week after the two sides agreed on a ceasefire.

A threat by President Donald Trump to halt trade negotiations with both Cambodia and Thailand until a truce had been reached forced both sides to the negotiating table. Even so, the ceasefire looks shaky.