The enthusiasm of Cambodia's Vietnamese community for the Viet Cong grew with each new tale of Communist success.*** Several thousand Vietnamese youths trooped to the Viet Cong colors. Most served along the frontier, often with COSVN. They came to form a majority in some COSVN components -- for instance, its Border Defense com¬mand. Likewise, the Viet Cong,smugglers became increas¬ingly adept. Throughout the early sixties, their most valuable export was potassium chlorate, used for Viet Cong bombs