un second site:
http://www.civilwar.nps.gov/cwss/manassas/index.htm
social:
http://www.civilwar.nps.gov/cwss/manassas/social/index.htm
économique:
http://www.civilwar.nps.gov/cwss/manassas/economic/index.htm
politique:
http://www.civilwar.nps.gov/cwss/manassas/political/index.htm
militaire:
http://www.civilwar.nps.gov/cwss/manassas/military/index.htm