Viet Nam and Cambodia are two neighboring countries with friendly and harmonious relations, with their people having a long history of solidarity, mutual support, and assistance. During the resistance against the common enemy, French colonialists and American imperialists, in response to the call of the Cambodian revolution, Vietnam was ready to send volunteer troops to help its neighboring country. The victory in Cambodia’s struggle against the U.S. imperialist forces on April 17, 1975, was also a victory of the enduring and sincere solidarity between the three Indochinese countries.