sentences:  Yingling served three tours in the Iraq War, first as executive officer of 2nd Battalion, 18th Field Artillery in OIF I, as the effects coordinator for the 3rd ACR from March 2005 to March 2006 during OIF III, and finally as J5 for TF 134 (Detainee Operations) from April 2008 to July 2009.He retired from the Army in 2012 to teach high school social studies.Yingling graduated from Duquesne University in 1989 with a degree in international relations, and was commissioned as a 2nd Lieutenant in Field Artillery through Army ROTC.