I watch on TV the planes of NATO bombing Kadafi's forces during the night. Same tactic was used in Iraq, Serbia etc. The idea is that you cannot take down something you cannot see. Or something radar cannot see. I was thinking that this tactic was used experimentally in the begining, in the Pacific. Especially when the first kamikazis started to target the Navy's vessels. Experimentally because many officers believed that it was not correct tacticly. Aircrafts from the big 'E' had been bombed all night long the Japanese airfields within their range so to have some relief the next day. And the night raids were so successful that some days no attack from Japanese planes happened. Of course the development of the radar played vital role. I cannot recall the name of the superior officer who introduce this tactic. The results showed that he won the bet. (Same tactic was used in Western Front also for bombing Germany and make Goering embarassed).