The Department of Defense, specifically the Department of the Air Force, has issued a Combined Synopsis/Solicitation notice for High Power Electromagnetics (HPEM) Modeling and Effects. This five-year Closed One-Step BAA with CALLs aims to solicit proposals for the Air Force Research Laboratory (AFRL), Directed Energy Directorate (DE), High Power Electromagnetic Division (RDH), for research areas of interest for HPEM Modeling and Effects. The purpose of this procurement is to conduct research in the field of High Power Electromagnetics, which involves the study of the modeling and effects of high power electromagnetic waves. The procurement will be conducted through the issuance of CALLs at various times against this BAA. Multiple subsequent CALLs are expected to be announced sequentially or concurrently in SAM.gov. The Government reserves the right to re-issue previously announced CALL areas with a second, subsequent submittal period and also reserves the right to issue no CALLs for any given technology area.