The U.S. Navy has stood up an aggressor squadron to train its submariners, as well as anti-submarine forces, about what to expect from their potential opposing counterparts, especially those in Russia and China, and help explore new tactics, techniques, and procedures to counter those threats. This already includes a focus on how electronic warfare impacts submarine warfare operations.
The unit, abbreviated AGGRON, is part of the Navy's Undersea Warfighting Development Center (UWDC). It has elements at both the UWDC's headquarters at Naval Submarine Base New London in Groton, Connecticut and at the Point Loma Annex in San Diego, California. The Navy formally established the squadron between the Spring and Summer of 2019, according to issues of Undersea Warfare magazine, the official publication of the Submarine Force. The service had first publicly announced its plans to create AGGRON in 2018 as we reported on at the time.