The U.S. Marine Corps has killed its Amphibious Assault Vehicle survivability upgrade program as it turns focus to the future and aligns with the new National Defense Strategy.

The service executed a stop work order Aug. 27 to SAIC, which was under contract to perform survivability upgrades to the 40-plus-year-old AAV fleet to include new tracks to enhance mobility as well as increased underbelly armor, blast-mitigating seats, a new engine and transmission along with an assortment of suspension upgrades.