April 23, 2023 marks the 115th Birthday of the United States Army Reserve.
“What began in 1908 as a small corps of medical professionals held in readiness for duty is today the Army’s global operational reserve force, with a presence in all 50 states, five U.S. Territories and 20 Time Zones across the globe.”
https://www.usar.army.mil/ArmyReserveBirthday/