During the “official” phase of Bush War II, the US made 50 strikes at high level leadership targets. The result: 0 for 50. Hundreds of Iraqi civilian “non-targets” did die though from those. (Cite: recent PBS “Frontline”.)
Yeah, you can take out a bunker. But there’s a lot of bunkers. There’s also far, far more non-bunkers. You going to take out everything in a country? That leads to Bad Things during the occupation phase.
While people talk about mobile and remote sensing here, smaller, cheaper devices are going to be big. Scatter a bunch of 2" square sensors over an area of interest. Once in while send a “talk to me in 5 microseconds” command to each. Learn what’s going on.
Note that defeating hi-tech weapons can be amazingly easy. In Yugoslovia, the Serbs made hundreds of fake tanks and scattered them around. The US claimed an immense number of hits on them. Big news in the media. Years later, they find out they hardly hit a single real tank. Little news in the media.
Even if they had today’s tech in Vietnam, it wouldn’t have made much difference. (Except for the airwar in the North.) Hi-tech doesn’t work against non-tech enemies who dig holes in jungles.
There’s been too much overconfidence lately based on success against low-morale troops in open desert country. Most wars aren’t fought in such an idealized situation.