The next year (54 B.C.), a little earlier in the season, Caesar made a
second invasion with a much larger force, and penetrated the country a
short distance north of the Thames. Before the September gales set
in, he reembarked for the Continent, never to return.
The total results of his two expeditions were a number of natives
carried as hostages to Rome, a long train of captives destined to be
sold in the slave markets, and some promises of tribute which the
Britons never fulfilled. Tacitus, the Roman historian, says Caesar
"did not conquer Britain; he only showed it to the Romans."