The clashes followed months of tensions over a century-old border dispute between the Southeast Asian neighbours. What is the history of this dispute, and what happens now?

On Thursday, violence broke out on the border between Thailand and Cambodia as long-simmering tensions between the two nations imploded.

Earlier this month, Thailand's Prime Minister Paetongtarn Shinawatra telephoned Cambodia's former Prime Minister Hun Sen.

A war-like situation has erupted between Thailand and Cambodia, with military strikes targeting key locations and resulting in at least 12 deaths, dozens wounded, and mass evacuations. At the heart of this violent escalation lies the 900-year-old Preah Vihear Temple,

"The U.S. already flunked the test and that should be a wakeup call," a former senior U.S. State Department official told Newsweek.