Radar keeps a surveillance eye on the battlefield: RF energy of various frequencies, coupled with advanced digital signal processing, helps U.S. and allied forces detect the enemy, pick out targets, and create an interactive picture of the war zone.

The article takes a look at some of the U.S. military and allied radar system development and deployment programs in 2021. It reports the contract awarded by the U.S. Air Force to Lockheed Martin to build Three-Dimensional Expeditionary Long-Range Radars (3DELRR). Details of the order placed by the U.S. Army with General Dynamics Land Systems for kits to install the Trophy expedited active protection system aboard M1A2 Abrams SEPv2 and SEPv3 main battle tanks are presented.