Treatise on Military Preparedness (Vol. 98)

...officers and soldiers meet for patrol.

Defensive Position of the Digang Bazong

Along the southern bank, it begins at Chikou and extends down to East Liang Mountain, totaling 350 li. Along the northern bank, it begins at Laozhoutou and extends down to West Liang Mountain, totaling 300 li. There are 36 combat vessels, including patrol, oared, and cruising boats, with 528 officers and soldiers divided into four patrols. The upper patrol meets with the officers and soldiers of the Anqing garrison, and the lower patrol meets with the officers and soldiers of the roving troop battalion bazong.

Defensive Position of the Roving Troop Bazong

Along the southern bank, it begins at East Liang Mountain and extends down to Gaozi, totaling 340...

Treatise on Military Preparedness, Volume 120: Records of Occupation and Measurement, Measurement, River Defenses II