FRCs historian, Bob Morrison, provides some background for first battle of the Stars and Stripes on the American Thinker blog:

September 11th has an important meaning for all of us as Americans, quite apart from 9/11. And it's one that should shape our reaction to those terrorist attacks. September 11, 1777 is reliably reported to have been the first time the Stars and Stripes were carried into battle. It was at Brandywine Creek, in Pennsylvania.

Read the rest at American Thinker.