Guidon (United States)

In the United States Army, Navy, Marine Corps, Coast Guard and Air Force, a guidon is a military standard that company or platoon-sized elements carry to signify their unit designation and corps affiliation or the title of the individual who carries it. A basic guidon can be rectangular, but sometimes has a triangular portion removed from the fly (known as "swallow-tailed").

The significance and importance of the guidon is that it represents the unit and its commanding officer. When the commander is in, his or her guidon is displayed for everyone to see. When the commander leaves for the day, the guidon is taken down. It is an honor to be the guidon carrier for a unit, known as a "guidon bearer" or "guide". He or she stands in front of the unit alongside of the commander (or the commander's representative), and is the rallying point for troops to fall into formation when the order is given. In drill and ceremonies, the guidon and commander are always in front of the formation.

The guidon is a great source of pride for the unit, and several military traditions have developed around it, stemming back from ancient times. Any sort of disgrace toward the guidon is considered a dishonor of the unit as a whole, and punishment is typical. For example, should the guidon bearer drop the guidon, they must fall with it and perform punishment, often in the form of push-ups. Other units may attempt to steal the guidon to demoralize or antagonize the unit. Veteran soldiers know not to give up the guidon to anyone outside their unit, but new recruits may be tempted into relinquishing it by a superior, especially during a unit run.

As described in Chapter 6 of Army Regulation 840-10, guidons are swallow-tailed marker flags in branch-of-service colors, measuring 20 inches (51 cm) at the hoist by 27 inches (69 cm) at the fly, with the swallow-tail end forked 10 inches (25 cm). Previously guidons were made of wool bunting, and if serviceable these older versions may still be used. Current guidons are made of heavyweight rayon banner cloth. Old guidons show letters and numerals reversed as if printed through on the reverse of the guidon. Current guidons are made so that letters and numerals read correctly on both sides.

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