Amongst the various reported units affiliated with the umbrella organization known as the "Valley Division"..... I noticed with the "3rd Battalion - Wises Legion" link, it has a photo of troops on their link page with this same flag... So it might be something the Wise Legion group is using...

There are some mainstream groups out there that carry some semi-historic looking or generic banner of sorts to denote and identify themselves on the field... that typically has no actual historical basis or significance to unit, time, or place... At the higher quality events such items not correctly reflecting historical portrayal time/place are not allowed.... At some of the lessor grade cowboy style, powder burning, shoot-em up, put on a show carnival events... not so much...

Not all reenactment groups or events are created equal... Some go to great lengths to nurture and produce a higher level of authenticity... To some others its simply costume dress up themed camping....

Frederick