This thought may be too late for your event but....
A few years ago we did a World War II theme afternoon with a mock radio show . The announcer did war bulletins amid Andrew Sisters type songs and radio ads with jingles and show theme songs.

It ended with the anthems from each military group with veterans invited to stand while their Corp was honored. Audience loved it. And the food included red white and blue Jello decorated with flags along with Spam.

Sometimes hokey works.