The distinct cavalry branch ceased to exist when it was absorbed into the Armor branch in 1951, during the Korean War. Other regiments of both armored and air cavalry exist in the Army. The patches on 1st Cavalry Division helicopters that served in Vietnam retained the symbol of a horse, symbolizing the mobility that characterized the original horse cavalry. In spite of the formal disbanding of the branch, however, the recognition of it continues on within the Army's armor and aviation branches, where some officers choose cavalry branch insignia over the very similar armor branch insignia or aviation "prop and wing" insignia.