Editing First Battle of Bull Run (section)

===Intelligence===
During the previous year, U.S. Army captain [[Thomas Jordan (general)|Thomas Jordan]] set up a pro-Southern spy network in [[Washington, D.C.]], recruiting [[Rose O'Neal Greenhow]], a prominent socialite with a wide range of contacts.<ref name="fishel">Fishel, Edwin C., ''The Secret War For The Union: The Untold Story of Military Intelligence in the Civil War'', Boston: Houghton Mifflin, 1996, pp. 59–63</ref> He provided her with a code for messages.<ref name="bioArc">[https://arcweb.archives.gov/arc/action/AdvancedSearchForm "Greenhow, Rose O'Neal"] {{Webarchive |url=https://web.archive.org/web/20160120211241/https://arcweb.archives.gov/arc/action/AdvancedSearchForm |date=January 20, 2016 }}, (1817–1864), ''The National Archives – People Description''. 1817–1864, (accessed February 5, 2013)</ref> After he left to join the Confederate Army, he gave her control of his network but continued to receive reports from her.<ref name="fishel"/> On July 9 and 16, Greenhow passed secret messages to Confederate General [[P.G.T. Beauregard]] containing critical information regarding military movements for what would be the First Battle of Bull Run, including the plans of Union general McDowell.<ref name="bioArc"/><ref>[http://www.wdl.org/en/item/2706/ "Letter Written in Cipher on Mourning Paper by Rose Greenhow"] {{Webarchive|url=https://web.archive.org/web/20130605154449/http://www.wdl.org/en/item/2706/ |date=June 5, 2013 }}, National Archives and Records Administration, World Digital Library</ref>