I've only had time to look over a few of the pages, but this seems at least as good as the Wikipedia synopsis of Apr 19th. Also looks like it has entries on the entire Rev War organized in chronological order.
http://www.patriotresource.com/amerrev/index.html (http://www.patriotresource.com/amerrev/index.html)
There are a lot of ads to navigate around, but seemingly a lot of good content too.
Thor