Daniel J. Petrosky was commissioned an Artillery Officer upon graduation from Officer Candidate School Class 20B-67, 29 May 1967. His first duty assignment was as a Platoon Leader and Executive Officer, 2d Battalion, 42d Field Artillery, 197th Infantry, Fort Benning, Georgia. | His subsequent duty assignments include: Platoon Leader and Operations Officer, C Battery, 4th Battalion, 77th Aerial Rocket Artillery, Vietnam; Assistant S-3 and S-3, 4th Battalion, 77th Aerial Artillery, Fort Campbell, Kentucky; Battery Commander, C Battery, 3/319th Field Artillery, Fort Campbell, Kentucky; Assistant S-3 and S-3, 17th Combat Aviation Group, Seoul, Korea; Company Commander, 55th Army Aviation Company, Seoul, AB Republic of Korea; Eighth United States Army Aviation Staff Officer, 17th Combat Aviation Brigade, Yongsan, Republic of Korea; Assistant Professor of Military Science and Professor of Military Science, University of Southern California, Los Angeles, California; Squadron Commander, Combat Aviation Squadron, 2d Armored Cavalry Regiment, Feucht, Federal Republic of Germany; Regimental Executive Officer, 2d Armored Cavalry Regiment, Nuremberg, Federal Republic of Germany; Battle Staff Commander, US Atlantic Command, Langley Army Base, Virginia; Brigade Commander, 4th Aviation Brigade, 1st Armored Division , Katterbach, Federal Republic of Germany and Desert Storm; Brigade Commander, Aviation Brigade, 3d Infantry Division, Katterbach, Federal Republic of Germany; Chief of Staff, 3d Infantry Division, Wurzburg, Federal Republic of Germany; Assistant Division Commander, 101st Airborne Division, Fort Campbell, Kentucky; Deputy Commanding General, U.S. Army Aviation Center and School, Fort Rucker, Alabama; Deputy Chief of Staff, Operations, U.S. Army Europe and 7th Army, Heidelberg, Federal Republic of Germany and Kaposvar, Hungary; Commanding General, U.S. Army Aviation Center and School, Fort Rucker, Alabama; Chief of Staff, United Nations Command/ Combined Forces Command/ United States Forces Korea and Commanding General, Eighth United States Army.