They had an integrated AD system with centralized control through command centers connected via fiber optical cables. The French had helped them design this system. Their AD was quite extensive with French supplied ROLAND, as well as contemporary Soviet equipment. Their air force had MiG-29, MiG-25, Mirage F-1, all in large numbers. This was not a pushover military by any means, but they were simply outclassed by a USAF operating at its peak.

And when the US was fighting in Vietnam, the Vietnamese arguably had one of the best AD systems that was highly effective. The Soviets spared no expense in supplying (and often manning) their IAD.