Quite of few hits came up for chess sets.
Chesshouse.com actually has a category of chess sets named "Revolutionary War Chess Sets" There are other military themed-sets too, of course.
And while you're out BBQing on Wednesday, the chess competitor in you may decide to focus on Championship BBQ ... read more here. DG over at the BCC picked up on this article last year and proposed a BBQ/Chess competition.
After cooking up your BBQ, sit down and enjoy your picnic and a nice game of chess ... but be careful about the distractions.Enjoy the 4th!
HAPPY BIRTHDAY to the United States of America!