Salient: Victoria University Students' Paper. Vol. 28, No. 9. 1965.
Any North Vietnamese who reach main South Vietnamese battlefields do so by making a journey roughly equivalent to walking the whole length of the South Island of New Zealand.
A decisive invasion of South Vietnam by North Vietnam is simply not within the realm of the physically possible. Even moderate outside support of local rebellion must be regarded as highly problematical.
The caches of arms captured from time to time by the Americans or by mercenary forces are flea-bites, militarily speaking.
The cause of the revolt in South Vietnam was a social policy which conceded too much to the wealthy, and forced some of the very poor below subsistence level.