The only time I heard of large fixed blade knives being used was by the navy. Night watch on board ships along rivers. IIRC, Adm. Dahlgen gave to order that sailors be armed with a rifle, a pistol and and anything edged like a bowie, a sword, an axe, etc. Some ships had swords, axes, pikes stored on deck. The guard would be the first line of defense if a boarding was to take place and he'd need as much firepower as possible until the crew managed to get to battle stations.