Oh, sigh, there used to be -- but the site hosting the information has undergone several ownership changes and nearly all of the useful material has been removed.
What it had that was useful was extracted from an extensive appendix, "Lineages," in the book _The Continental Army_ by Wright, Robert K.; Center of Military History, United States Army; Washington, D. C., 1983.
The first half or so of the book, which is a useful history, is online at:
And look for Lossing's atlas of the American Revolution, which has a lot of information and maps for selected engagements.
In essence, if you want to know what your relatives participated in, you must do the detailed research on whether they were in one of the Continental Army regiments, a State Troop regiment or in a militia unit in an area (mostly on the frontiers) that may have seen an attack or skirmish.
It's always the pesky details that are the hardest to acquire, but you can post further questions about more specific resources here or on the Ancestry.com message boards about the Revolutionary War: