In Cambodia, the duel is continuing for control of Highway Four linking Phnom Penh with the main seaport of Kompong Som.
In Cambodia, the duel is continuing for control of Highway Four linking Phnom Penh with the main seaport of Kompong Som. At the moment, Communist guerrillas - perched on a mountain pass - control the road.
The Cambodian government has been sending reinforcements to try to break the Vietcong grip, but all their efforts so far have been in vain.
One reason is that much of the countryside in the contested area is covered in jungle - unfamiliar terrain to the Cambodians who are accustomed to fighting in the paddy-fields.
Furthermore, the Vietcong appear to be deliberately trying to avoid contact.
While the Cambodian menfolk are bearing the brunt of the battle, women soldiers have been enlisted to help with a job normally done by man in peacetime: harvesting the rice crops.
Rice-growing is one of Cambodia's main industries and the major source of its foreign exchange earnings. But export supplies are stockpiling in Phnom Penh because Highway Four to Kompong Som and the outside world is closed.