The U.S. military was "effective" because:
After losing in Vietnam they never picked on a country that teeth to bite back.
They had allies that would follow them into their shit stirring and fill in the gaps in their support structure.
Had semi-qualified and only moderately corrupt military leadership.
This year they picked a fight with someone that could bite back. Pissed off their allies with trade wars. Installed extremely corrupt and incompetent leadership.
How old and large is the plant?
The first few years as the plant mass grows you don't want to prune anything.
Once the plant is established, cutting the early vines helps with increasing and concentrating yield. Commercially the spray a dissicant on the early growth to knock them back.