During a rally speech to supporters in the northeastern U.S. state of Pennsylvania on Tuesday, Trump listed various conflicts he has become involved with diplomatically, concluding with: "And I hate to say this, one named Cambodia-Thailand, that it started up today."
"Tomorrow, I have to make a phone call, and I think they'll get it," he continued.
"Who else could say, 'I'm going to make a phone call and stop a war of two very powerful countries'?"
Trump co-signed a truce between a Cambodia and Thailand in October during a visit to Asia.
The dispute between Thailand and Cambodia centers on a century-old disagreement over borders mapped during France's colonial rule in the region, with both sides claiming a smattering of boundary temples.