It was during the same period that the Chauci, free, as it happened, from dissension at home and emboldened by the death of Sanquinius, made, while Corbulo was on his way, an inroad into Lower Germany, under the leadership of Gannascus. This man was of the tribe of the Canninefates, had served long as our auxiliary, had then deserted, and, getting some light vessels, had made piratical descents specially on the coast of Gaul, inhabited, he knew, by a wealthy and unwarlike population. Corbulo meanwhile entered the province with careful preparation and soon winning a renown of which that campaign was the beginning, he brought his triremes up the channel of the Rhine and the rest of his vessels up the estuaries and canals to which they were adapted. Having sunk the enemy's flotilla, driven out Gannascus, and brought everything into good order, he restored the discipline of former days among legions which had forgotten the labours and toils of the soldier and delighted only in plunder. No one was to fall out of the line; no one was to fight without orders. At the outposts, on guard, in the duties of day and of night, they were always to be under arms. One soldier, it was said, had suffered death for working at the trenches without his sword, another for wearing nothing as he dug, but his poniard. These extreme and possibly false stories at least had their origin in the general's real severity. We may be sure that he was strict and implacable to serious offences, when such sternness in regard to trifles could be believed of him.