With almost threequarters of a million men under armsabout 5 percent of the Nations populationSouth Vietnam is carrying by far the greatest burden in this battle against aggression. It is a burden that. without our help. would become intolerable. Growing warfare has turned more than half a million people out of their homes and into refugee camps. Communist interdiction has turned the rice bowl of southeast Asia from an exporter of rice to an importer. Bombs and bullets have blasted the countrys normal exports. so that Vietnam can no longer afford to buy the cement and steel. the fertilizer. or the books its people need.