Revenant
AGM-45 Shrike. The US's first Anti Radiation Missile. It was tuned to home in on pre set radar frequencies at their emitter, the radar's antenna. It's range was less than that of the SA-2, but it gave the Weasels some stand off capability compared to rackets, bombs, and guns. It could be countered by the radar being shut down (causing any SAMs in flight to go blind), and if this happened, it would not "remember" where the radar was, and go blind itself.
it was supplemented by the AGM-78 Standard ARM which was a modified Navy Surface to Air Missile that had its' SAM seeker head replaced with an ARM head. It was faster and longer ranged than the Shrike, and also had a memory to remember the position of any radars it was homing in on and shut down after launch. Only the F-105G, F-4G, and A-6B had the systems and wiring to carry this missile operationally
both types were later supplemented in the 80s and then eventually replaced by the AGM-88 HARM in US service. The HARM has most of the capabilities of the Standard ARM in a missile slightly larger than the Shrike, and in a system that can be used on more aircraft types. It has been improved and is still in use currently.