U.S President Donald Trump says the leaders of Cambodia and Thailand have agreed to meet for ceasefire talks following his intervention.

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

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday (July 25) as their worst fighting in over a decade intensified and spread to new areas, despite international calls for a ceasefire.

As Cambodia-Thailand border tensions escalate, the crisis spotlights a groundbreaking trend: women military leaders at the forefront.