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

June, Paetongtarn Shinawatra, who was then-prime minister of Thailand, made a call to Cambodia’s de facto leader, Hun Sen, to address a recent escalation along the border between the two countries that had left a Cambodian soldier dead.

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,

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.