to chief warrant officer 2. They derive their authority from the same source as commissioned officers but remain specialists, in contrast to commissioned officers, who are generalists. There are no warrant officers in the Air Force or Space Force. Warrant officers are typically non-commissioned officers before being selected, with the exception of the Army Aviation where any enlisted grade can apply for a warrant. Army Warrant officers attend the Army Warrant Officer Candidate School. Enlisted corps Enlisted personnel consists of 82% of the armed forces, serving as specialists and tactical leaders. Enlisted personnel are divided into three categories: E-1 to E-3/4: Junior enlisted personnel are usually in initial training or at their first assignment. E-1 to E-3 in the Marine Corps, Navy, and Coast Guard, and E-1 to E-4 in the Army, Air Force, and Space Force. In the Army, specialist (E-4) are considered to be junior enlisted, while corporals (E-4) are non-commissioned officers. E-4/5 to E-6: Non-commissioned officers in the Army, Marine Corps, Air Force, and Space Force and petty officers in the Navy and Coast Guard. In the Air Force and Space Force, E-5 is the first non-commissioned officer rank. Non-commissioned officers and petty officers are responsible for tactical leadership. E-7 to E-9: Senior non-commissioned officers in the Army, Marine Corps, Air Force, and Space Force and chief petty officers in the Navy and Coast Guard. Serve as senior enlisted advisors to officers. The rank of senior enlisted advisor is the highest rank in each service, serving as the primary advisors to their service secretary and service chief on enlisted matters. Prior to entering their service, enlisted personnel must complete their service's basic training. In the Army, after completing Basic Combat Training recruits then go to advanced individual training for their military occupational specialty. In the Marine Corps, after completing Recruit Training, marines attend the School of Infantry, going to the Infantry Training Battalion for infantry marines, with non-infantry marines completing Marine Combat Training before advancing to technical training for their military occupational specialty. In the Navy, after completing Recruit Training, sailors advance to their "A" schools to complete training for their rating. In the Air Force and Space Force, recruits complete combined Basic Military Training before going to technical training for their Air Force Specialty Codes. In the Coast Guard, after completing Recruit Training, sailors advance to their "A" schools to complete training for their rating. Women