Lineage 2nd Battalion, 503rd Infantry Regiment

^ lineage , honors information: 2d battalion, 503d infantry regiment (the rock regiment). u.s. army center military history. 2 june 2010. web. accessed 23 november 2015. <http://www.history.army.mil/html/forcestruc/lineages/branches/inf/0503in002bn.htm>.  this article incorporates text source, in public domain.