PENNSYLVANIA HISTORY FROM THE STATE ARCHIVE

http://www.portal.state.pa.us/portal/server.pt/community/pennsylvania_history/

Found this link today, as a citizen of Pennsylvania I never knew this existed.   I imagine there are lot of things to peruse if we had the time to search.

MILITARY HISTORY ONLINE

http://www.militaryhistoryonline.com/

I found this link on another blog.  I haven't viewed it in depth, but it is postings of other people.  You might find some great information.