From some evidence, they used pi chawa in Krabuan Phayuhayattra (กระบวนพยุหยาตรา, military march) in the pre-Ayutthaya period.
From some evidence, they employed pi chawa in Krabuan Phayuhayattra (กระบวนพยุหยาตรา, military march) during the pre-Ayutthaya era.