But the fiery bout in Southeast Asia also marks a test for Washington's waning influence in a region viewed as a crucial theater in a geopolitical competition between the United States and China. "This crisis represents a critical test of American and Chinese influence in Southeast Asia,

At least 16 people have been killed and tens of thousands have been displaced as fighting extended to a second day.

The current clashes erupted on Thursday with an exchange of fire near Prasat Ta Muen Thom, an ancient temple claimed by both nations. It followed two months of tensions over contested territory that began in late May after a Cambodian soldier was killed in a skirmish.