A Union cavalry guidon carrier in the Civil War bore the small, swallow-tailed flag that marked the position and identity of a company or troop. Riding near the front, he needed strong horsemanship and steady nerves, as the guidon had to remain visible amid dust, smoke, and rapid maneuvers. The guidon helped maintain formation, guided movements during charges, and served as a rallying point in chaotic fighting. Though not typically an officer, the carrier held a position of honor and responsibility, often drawing enemy fire. His role symbolized unit pride while providing a practical visual signal on fast-moving cavalry battlefields.