The corps headquarters saw its first combat deployment since the Second World War in 2004, when it deployed to Iraq for Operation Iraqi Freedom. There, III Corps headquarters assumed duties as Headquarters Multi-National Corps – Iraq, relieving V Corps. III Corps served as the administrative command for 2,500 soldiers of the Multi-National Force – Iraq command element, providing operational direction into 2005, when it was returned to Fort Hood, relieved by XVIII Airborne Corps. III Corps has for many years participated in an exchange program which sees a Canadian Army officer appointed as a deputy commanding general. Notably, Peter Devlin deployed with the corps to Iraq in 2005.