President Trump helped end a simmering conflict between Cambodia and Thailand in the summer, but the ceasefire didn't last long.

Cambodia's powerful Senate President Hun Sen on Tuesday vowed a fierce fight against Thailand as a second day of widespread renewed combat between the Southeast Asian neighbors drove tens of thousands of people to flee border areas.

At nine months pregnant, 27-year-old Suang Sreang fears she will have to give birth in a rudimentary displacement camp after fleeing fighting between Cambodian and Thai troops along their disputed border.

Armed clashes between Thailand and Cambodia entered a second day on Tuesday, both sides said, in defiance of calls from the United States to stop fighting and adhere to a months-old Trump-brokered peace deal that now looks on the brink of complete collapse.

A second day of widespread renewed combat between Thailand and Cambodia Tuesday drove tens of thousands of people to flee border areas. The fighting follows a skirmish Sunday that injured two Thai soldiers and derailed a ceasefire pushed by U.