premise: Men recreating an Ancient Fife and Drum Corps from the American Revolutionary War are marching in a modern parade while wearing white wigs, black tricorn hats, white waistcoats, and white knickers or knee breeches. hypothesis: War reenacters participate in the parade to drum up awareness of the new history museum in Massachussetts.
neutral: They may not be trying to drum up awareness of anything, just recreating for fun.