Town and community · added September 14, 2026
Western Oklahoma festival chronology
Evidence note · medium confidenceWhat the evidence supports
December 16, 1957 Greer County News announces March 10 festival at Mangum with expected 325 musicians from Carnegie, Anadarko, Thomas, Weatherford, Hydro and Mangum, to form three massed bands.
Limits and open questions
Prospective March after December implies 1958, not a completed 1957 festival. Temporary massed groups and anticipated attendance do not create permanent ensembles.
Confidence detail: high for announcement; medium for inferred event year. Evidence notes are not a count of distinct ensembles.