In 356, after leaving Cologne, Julian the Apostate, the future Roman emperor, wintered in Senonae (possibly modern Sens) in Gaul.
However, lacking advanced siegecraft, they were not able to break into the town and could only prevent Julian from venturing outside the walls.
[1] Finally, after a month the savages withdrew crestfallen, muttering that they had been silly and foolish to have contemplated the blockade of the city.
But — a thing to be regarded as a shameful situation — while Caesar was in jeopardy, Marcellus, master of the horse, although he was stationed in neighbouring posts, postponed sending him reinforcements; whereas even if the city alone was endangered, to say nothing of the prince's presence there, it ought to have been saved from the hardships of blockade by the intervention of a large force.
[2]This article about a battle or war of ancient Roman history is a stub.