Magnepulse Ordnance
this form of bombardment weapon was developed by the Empire shortly before the Battle of Yavin. Also known as magnetic bombard, the magnepulse ordnance is detonated above a city or other target, and has two forms which deliver a great magnetic pulse that shorts out communications, droids, and other hi-tech equipment. The pulse can be delivered by a cannon blast or a cluster bomb, although the cluster bomb could be shot down prior to detonation.