Premise: Thai soldiers have been accused of crossing into Cambodia near a disputed temple where the two sides briefly exchanged fire last year. A spokesman for Cambodia's government said that about 100 troops crossed the border before retreating hours later. A Thai border commander denied there had been any troop movements and said there had been no increase in tension. Thailand and Cambodia both lay claim to the temple area. Despite several rounds of talks, a settlement remains elusive. Soldiers from the two countries have been stationed in the area since the clashes in July last year.
Hypothesis: Cambodia and Thailand have been at war with each other before.