"New Communist weapons - Soviet, Chinese and Czechoslovak models - are appearing on the battlefields. U.S. armored amphibious vehicles all show the marks of having been hit by fire from recoilless rifles and heavy automatic weapons. There is not a single helicopter in the Delta that hasn't been hit by ground fire. The guerrilla infantrymen carry a new Soviet carbine, equipped with bayonet for close-combat. In addition, the Communists, on the average, are capturing three weapons from the Vietnamese armed forces for every two they lose in battle."
"But everyone realizes that if the conflict between the two governments continues, the infection from it will, sooner or later, seep into the countryside. And the countryside is where this war is going to be won - or lost"
More article about the Vietnam War can be found here...