The Order of the Spur is a Cavalry  tradition within the United States Military. Soldiers serving with Cavalry units (referred to as Troopers) are inducted into the Order of the Spur after successfully completing a "Spur Ride" or for having served during combat as a member of a Cavalry unit. Traditionally, each Trooper is presented spurs by their sponsor at a ceremonial dining in commonly referred to as the "Spur Dinner". The spurs are to be worn with the military uniform during Squadron or Regimental ceremonies and events or as designated by the Cavalry unit commander. In some units, gold spurs are awarded for combat inductions while silver spurs represent having completed the Spur Ride.

The tradition of having to "earn your spurs" reaches back to the beginning of the cavalry. When green Troopers first arrived at their new cavalry assignments they were assigned a horse with a shaved tail. This led to the nickname "Shave Tail" for newly assigned, spur-less Soldiers. These new Troopers were in need of extensive training, especially in the area of swordsmanship from atop a horse. The horse with a shaved tail was given extra space in which to operate since its rider was marked as an amateur. During this phase of training the Troopers were not allowed to wear spurs because this would only serve to compound their problems. Only when they were able to prove their ability to perform with their horse and saber were they awarded spurs.