South African National Defense Force soldiers sing ahead of a joint U.S.-South African simulated assault on July 26 as part of Exercise Shared Accord 2011. SA ‘11 is a bi-lateral military training and civil assistance mission held annually throughout Africa. (U.S. Marine Corps photo by Cpl. Jad Sleiman) - South African National Defense Force soldiers sing ahead of a joint U.S.-South African simulated assault on July 26 as part of Exercise Shared Accord 2011. SA ‘11 is a bi-lateral military training and civil assistance mission held annually throughout Africa. (U.S. Marine Corps photo by Cpl. Jad Sleiman)