In what year did the NCO rank chevron rotate to point up?

The NCO rank chevron became oriented to point upwards in 1902. This change symbolized a new approach to the Non-Commissioned Officer Corps and represented the growing importance of NCOs in the Army. The upward-pointing chevron not only differentiated the rank from enlisted personnel but also visually indicated the leadership role NCOs played within the military structure. This modification was part of broader reforms in military organization and rank insignia during the early 20th century, aligning with a global military trend of establishing clear rank distinctions and upward mobility within the service.