The deadly conflict on the Thai-Cambodian border pits a longtime United States ally with decades of experience against a relatively young armed force with close ties to China.

Bangkok and Phnom Penh are fighting over territory disputed since colonial power France drew the border between them more than a century ago.

Clashes continued into Saturday, according to officials on both sides. More than a dozen people have been reported killed, dozens wounded, and more than 150,000 civilians evacuated since fighting began on Thursday.

Here’s a look at the histories and capabilities of the two sides.

Thailand’s military dwarfs that of neighboring Cambodia, both in personnel and weaponry.