Just because it was carried by U.S. Calvary? please, that is some manifested crap if i ever heard it.
Have you studied military manuals? I have and that flag being of military has nothing to do with being military by any statute or executive order for the purpose of a gold fringe and I cannot find any evidence of it's use being mandatory. What you will find though which I have verified by military personnel that horizontal stripes mean at war and vertical stripes mean at peace.
OPTIONAL
Marine colors are scarlet and gold. Unless your military it is optional.