During the years 2001 and 2002 a study has been performed by the project Assessment of Electronic Warfare to describe general and simple methods and rules for assessment of electronic warfare at tactical level. The objective is to create an understanding of electronic warfare (EW). The primary scope of this report is to be a quick introduction in electronic warfare and the basic physics. The scope is also to provide the reader with a more profound understanding for the basis on which EW stands. The document is primarily intended for: - People involved in EW wargames and - People interested in an overview within the EW field.