Colonel Dan D. Jennings, Jr. was commissioned as an Infantry Officer upon graduation from Officer Candidate School Class 8, 1 May 1942. His first duty assignment was a Platoon Leader, 48th Armored Infantry Regiment, 7th Armored Division, Camp Polk, Louisiana. | His subsequent duty assignments include: Commander, Division Commando Detachment, Seventh Armored Division, Camp Polk, Louisiana; Assistant Regimental S-3, 48th Armored Infantry Regiment, Mojave Desert; Company Commander, 38th Armored Infantry Battalion, Mojave Desert, European of Operations; Company Commander and Battalion S3, 4th Medium Tank Battalion, Fort Hood, Texas; G2 Operation Officer, 1st  Corps, Korea; Instructor, General Intelligence, 503rd Military Intelligence Service, Japan; Regimental S2, Camp Picket, Virginia; Regimental S3, Fort Meade, Maryland; Regimental S3, 3d Armored Cavalry Regiment, Germany; Battalion Executive Officer, 3d Armored Cavalry, Germany; Chief Armored Training, G3 Seventh Corps, Germany; Armored Battalion Advisor, North Carolina National Guard, Raeford, North Carolina; Joint and Special Plans, Office of Deputy Chief of Staff For Personal, United States Army, Pentagon; Squadron Commander, 2nd Squadron, 10th Cavalry, Korea; Joint and Command Operations Section and Instructor, Headquarter Command and General Staff College, Fort Leavenworth, Kansas; Commanding Officer, Fort Irwin, California; Director of Logistics, Taiwan Defense Command; Director of Policy, Taiwan Defense Command, Taipei, Taiwan. | His military awards and decorations include: the Combat Infantryman Badge, Silver Star, Bronze Star, Air Medal, Purple Heart, Legion of Merit w/ Oak Leaf Cluster, Army Commendation Ribbon and Meritorious Service Medal.