BANGKOK — Thailand launched airstrikes along the disputed border with Cambodia on Monday as both sides accused the other of attacking first. Tensions have simmered since the Southeast Asian neighbors signed a truce agreement in October pushed by U.S. President Donald Trump after their territorial disputes led to five days of combat in July that killed dozens of soldiers and civilians. Thai army spokesperson Maj. Gen. Winthai Suvaree said the Cambodian troops fired first into Thai territory in multiple areas. He said one Thai soldier was killed and four other soldiers were wounded, and that civilians were being evacuated from...