B-2 bomber

was the B-2 Spirit bomber designed to fight the Soviet Union in the cold war? what was the main targets and how would it locate them while remaining stealthy? from what ive read on the airplane it has advanced radars and no infra red which is the opposite of the smaller F-117 Nighthawk. can the radar be located giving the bombers position away? i read in an old edition of Air Force Monthly that some type of UAV would have flown with the B-2 over the Soviet Union looking for targets. i find that hard to believe as the technology for UAVs is only getting mature today for intelligent UAVs.