Mao era

In 1970, Lon Nol overthrew Sihanouk, and the latter fled to Beijing, where Pol Pot was also visiting. On the advice of the CCP, the Khmer Rouge changed its position, and in order to support Sihanouk, it established the National United Front of Kampuchea. In 1970 alone, the Chinese reportedly gave the United Front 400 tons of military aid. In April 1974, Sihanouk and Khmer Rouge leaders Ieng Sary and Khieu Samphan met with Mao in Beijing; Mao supported the policies which the Khmer Rouge proposed, but he did not want the Khmer Rouge to marginalize Sihanouk after they won the civil war and established a new Cambodia.

Works: Fortified structures designed to strengthen a position in battle. This includes earthworks, fieldworks, entrenchments, siege lines, etc.

Parole: A pledge by a prisoner of war or a defeated soldier not to bear arms. When prisoners were returned to their own side during the War (in exchange for men their side had captured) the parole was no longer in effect and they were allowed to pick up their weapons and fight. When the South lost the War and the Confederate armies gave their parole they promised never to bear weapons against the Union again.

Vedette(or vidette): A mounted sentry stationed in advance of a picket line.

Siege lines: Lines of works and fortifications that are built by both armies during a siege. The defenders build earthworks to strengthen their position inside a fort or city against assault while the besieging army constructs fortifications to protect siege guns and soldiers from sharpshooters inside the city.

Cartridge: Roll of thin paper which held a small amount of gun powder in the bottom and a ball or bullet in the top. A soldier needed to tear off the top of the cartridge in order to fire his weapon - part of the nine steps to fire a muzzle loading gun (or five to fire a breech loading gun).