6th U.S. Cavalry - Troop E - M1890 Service Guidon.

U.S. Army Red over White Guidon, Troop E, 6th US Cavalry.
It is an example of the bigger style of guidon used by American mounted troops for nearly a century, from the 1830s through to 1931. That year the Army adopted today's smaller 27" x 20" guidon a foot shorter in length, half a foot shorter in width and only half the surface area.

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