Notable for shooting down U-2s (plane, not band) and keeping USAF away from Hanoi.
Two days later President Johnson gave the order to attack known SA-75 positions outside the 30-mile exclusion zone. On the morning of July 27, 48 F-105s participated in the strike, Operation Spring High. The Vietnamese knew U.S. aircraft were coming, and set up many 23mm and 37mm anti-aircraft guns at the two SAM sites. These anti-aircraft guns were lethal at close range. The Vietnamese shot down six aircraft and more than half of the remaining U.S. aircraft suffered damage from ground fire. However, the Vietnamese had replaced the SAMs with white-painted bundles of bamboo. Operation Spring High had destroyed two decoy targets for the loss of six aircraft and five pilots.
You can see here how a weapon system doesn't have to be destroying targets to impact the warzone. When SA-2s began deployment, they were able to reach out and blap targets at 20km height. Bombers started flying under 3km height where SA-2s can't engage them... but that puts them within AAA gun range. Granted, AAA gun accuracy is rofl lol, but with enough lead in the air...
*I am proud that my first google proved that I had guessed the name/system right
