Tienchaianan, P., Amatyakul, P. and Natchanawakul, N. 2026. The Development of Thai School Marching Band During the Reign of King Rama IX. Rangsit Music Journal. 21, 1 (Jan. 2026), R0710 (21 pages). DOI:https://doi.org/10.59796/rmj.V21N1.2025.R0710.