U.S. Marine Corps Staff Sgt. John Koman, multi-purpose canine handler with Delta Company, 1st Marine Raider Support Battalion, U.S. Marine Corps Forces Special Operations Command, awaits command during the retirement ceremony of his multi-purpose canine, Roy, at Marine Corps Base Camp Pendleton, California, March 29, 2019. Koman and Roy have served together with 1st MRSB for five years. Upon his retirement, Roy was adopted by Koman. - U.S. Marine Corps Staff Sgt. John Koman, multi-purpose canine handler with Delta Company, 1st Marine Raider Support Battalion, U.S. Marine Corps Forces Special Operations Command, awaits command during the retirement ceremony of his multi-purpose canine, Roy, at Marine Corps Base Camp Pendleton, California, March 29, 2019. Koman and Roy have served together with 1st MRSB for five years. Upon his retirement, Roy was adopted by Koman.

Col. Jeffrey J. Kenney, center, poses for a photo with his wife Lori Kenney, left, and mother Carmela Kenney, right, at Marine Corps Base Camp Lejeune, N.C., Nov. 8, 2016. Kenney has served in the Marine Corps for 41 years and is scheduled to retire Dec. 21, 2016. Kenney is currently the officer-in-charge of Expeditionary Operations Training Group, II Marine Expeditionary Force Headquarters Group. - Col. Jeffrey J. Kenney, center, poses for a photo with his wife Lori Kenney, left, and mother Carmela Kenney, right, at Marine Corps Base Camp Lejeune, N.C., Nov. 8, 2016. Kenney has served in the Marine Corps for 41 years and is scheduled to retire Dec. 21, 2016. Kenney is currently the officer-in-charge of Expeditionary Operations Training Group, II Marine Expeditionary Force Headquarters Group.

Gen. John F. Kelly relinquished command of United States Southern Command Jan. 14, 2016. He will soon retire after more than 45 years of service. - Gen. John F. Kelly relinquished command of United States Southern Command Jan. 14, 2016. He will soon retire after more than 45 years of service.

Xxenos, a military working dog, rests during one of his combat deployments.The retired MWD passed away earlier this year at the age of 10. Xxenos had been retired three years and deployed three times during his career; twice to Iraq and once to Afghanistan. Xxenos was a Marine specialized search dog. - Xxenos, a military working dog, rests during one of his combat deployments.The retired MWD passed away earlier this year at the age of 10. Xxenos had been retired three years and deployed three times during his career; twice to Iraq and once to Afghanistan. Xxenos was a Marine specialized search dog.

As the final days in his Marine Corps career end, Lt. Gen. Robert E. Milstead Jr. Reflects on his past experiences and how he has molded his career to guide and inspire younger Marines. - As the final days in his Marine Corps career end, Lt. Gen. Robert E. Milstead Jr. Reflects on his past experiences and how he has molded his career to guide and inspire younger Marines.