Brig. Gen. Paul K. Lebidine (left), commanding general of 4th Marine Division, Sgt. Maj. Michael A. Miller (middle), incoming sergeant major of 4th MARDIV and Sgt. Maj. Daniel W. Fliegel (right), outgoing sergeant major of 4th MARDIV, participate in a relief and appointment and retirement ceremony at Marine Corps Support Facility New Orleans, March 16, 2017. Composed of more than 17,000 Marines, 4th MARDIV is the biggest division command in the Marine Corps. (U.S. Marine Corps photo by Pfc. Niles Lee/Released)