Functional domain: Each subject's functional status will be determined by the Musculoskeletal Function Assessment (MFA) and the SF-36 general health survey. The MFA is a written questionnaire that assesses activity and social limitations caused by musculoskeletal injury. After completing the questionnaires, subjects will be fit with the Stepwatch Activity Monitor (SAM, Cyma, Seattle WA) around their ankle. An investigator will give them verbal instructions about wearing the SAM. This is a small, pager-sized device which counts the number of steps taken by the wearer. The SAM will be worn around the subject's ankle for 14 days, and then the subject will return the monitor and activity log to the VA by visit or by mail. Assessments using the MFA and SF-36 will occur prior to surgical intervention and at 3, 6, 12, 24, and 36 months following the intervention. Long term follow-up using the MFA and SF-36 was approved in April 2017 and will continue until 12 years after the participant's ankle surgery. Assessments using the SAM will occur prior to surgical intervention and at 3, 6, 12, 24 and 36 months following the intervention. These assessments will provide data on functional limitations due to ankle arthritis and on the efficacy of the treatments in restoring functional ambulation.