Lance Cpl. Sierra Walker, supply specialist with 13th Marine Expeditionary Unit, tests the Global Combat Support System-Marine Corps Release 12 upgrade while deployed before its official launch. The Marine Corps upgraded the system in August to strengthen the Corps’ cybersecurity posture and offer a more customizable tool to ensure Marines can easily and clearly report readiness to their commander. - Lance Cpl. Sierra Walker, supply specialist with 13th Marine Expeditionary Unit, tests the Global Combat Support System-Marine Corps Release 12 upgrade while deployed before its official launch. The Marine Corps upgraded the system in August to strengthen the Corps’ cybersecurity posture and offer a more customizable tool to ensure Marines can easily and clearly report readiness to their commander.