When they went downtown in Hanoi.....they did.
Arclight was the name of the bombing campaign using B-52's down south and in Cambodia and Laos.
Linebacker was the name of the bombing operation up north.
Operation Arc Light
The sad fact is we bombed our Allies and never invaded the enemy!
Having been involved in some activities immediately following some of the bombing down South....they did have an effect if they landed on where the bad guys were. Sadly, they did not do that often enough.
A favorite tactic was sending Scout Helicopters and Gunships into the area right after the raids.....to do BDA and dispatch any NVA/VC seen wandering about the place. Organized resistance was not a real threat following the raids as the physical and psychological effect of 200,000 pounds of bombs falling on your neighborhood has to be seen to be believed. As the Buff's flew too high to be heard and usually unseen.....the warning you got was the sound of the bombs just before they hit. Add darkness and it must have been a terrible experience.
The craters have been put to good use as Cat Fish ponds today.