Question

The legacy "high-3" retirement system for the uniformed services requires service members to serve _____ years of active duty, or qualifying years of service for the reserve component, in order to qualify to receive the defined-benefit retired pay.

Answer 1

The legacy "high-3" retirement system for the uniformed services requires service members to serve 20 years of active duty.
The high-3 require its receivers give 'defined contribution', which include that they must complete various type of services for at least 20 years.