Via Ancestry Blog:
Do you think some of your ancestors fought in the Revolutionary War? There are many collections you can look in, but pension records are a good place to start.
Pension records often contain invaluable genealogical information, including vital events that you most likely won’t find anywhere else. For the Revolutionary War, the Revolutionary War Pension and Bounty-Land Warrant Application Files contain an estimated 80,000 application files from officers and enlisted men who served in the Revolutionary War in all branches of the American military: army, navy, and marines. Even if the claim was rejected, there will still be information there.