The Army also competes with the other services for a number of joint four-star positions, the most prestigious of which are the chairman of the Joint Chiefs of Staff (CJCS) and the NATO supreme allied commander in Europe (SACEUR). Other joint four-star positions have included unified combatant commanders; certain NATO staff positions; and the wartime theater commanders in Vietnam (MACV), Iraq (MNF-I), and Afghanistan (ISAF/RS).