Note 390 — Chapter VIII · (Year of Rome 700.) (Book V. of the “Commentaries.”) MARCH AGAINST THE TREVIRI—SECOND DESCENT IN BRITAIN.

The five legions which Cæsar led into Britain made, at about 5,000 men each, 25,000 men. There were, in addition to these, 2,000 cavalry. If we suppose, as in the first expedition, twenty-five horses per ship, it would require eighty to contain the cavalry. In the preceding year, eighty transport ships had been sufficient for two legions, without baggage—200 ought to have been enough for five legions; but as the “Commentaries” give us to understand that those vessels were narrower, and that the troops had their baggage, it may be believed that they required double the number of ships, that is, 400, for the transport of the five legions, which would make about sixty-two men in a ship. There would remain 160 transport ships for the Gaulish and Roman chiefs, the valets, and the provisions. The twenty-eight galleys were, no doubt, the true ships of war, destined to protect the fleet and the landing.