"I’m sure the ease with which bare-footed Vietcong marched into Saigon in 1975 now strengthens Pyongyang’s conviction that the “Yankee colony” will not last long after the colonisers pull out. In South Korea, meanwhile, conservatives are now loudly invoking the story of South Vietnam’s demise. They say, “There too you had a richer, freer state, and it fell only a few years after US troops pulled out. Let’s not make the same mistake”. They point worriedly to President Moon Jae-in’s own remark that he felt “delight” when predictions of US defeat in Vietnam came true."