On the 6th of October, therefore, the Great Captain broke up his camp at Castellone, and, abandoning the whole region north of the Garigliano to the enemy, struck into the interior of the country, and took post at San Germano, a strong place on the other side of the river, covered by the two fortresses of Monte Casino [16] and Rocca Secca. Into this last he threw a body of determined men under Villalba, and waited calmly the approach of the enemy.
It was not long before the columns of the latter were descried in full march on Ponte Corvo, at a few miles' distance only on the opposite side of the Garigliano. After a brief halt there, they traversed the bridge before that place and advanced confidently forward in the expectation of encountering little resistance from a foe so much their inferior. In this they were mistaken; the garrison of Rocca Secca, against which they directed their arms, handled them so roughly, that, after in vain endeavoring to carry the place in two desperate assaults, the marquis of Mantua resolved to abandon the attempt altogether, and, recrossing the river, to seek a more practicable point for his purpose lower down. [17]
Keeping along the right bank, therefore, to the southeast of the mountains of Fondi, he descended nearly to the mouth of the Garigliano, the site, as commonly supposed, of the ancient Minturnae. [18] The place was covered by a fortress called the Tower of the Garigliano, occupied by a small Spanish garrison, who made some resistance, but surrendered on being permitted to march out with the honors of war. On rejoining their countrymen under Gonsalvo, the latter were so much incensed that the garrison should have yielded on any terms, instead of dying on their posts, that, falling on them with their pikes, they massacred them all to a man. Gonsalvo did not think proper to punish this outrage, which, however shocking to his own feelings, indicated a desperate tone of resolution, which he felt he should have occasion to tax to the utmost in the present exigency. [19]
The ground now occupied by the armies was low and swampy, a character which it possessed in ancient times; the marshes on the southern side being supposed to be the same in which Marius concealed himself from his enemies during his proscription. [20] Its natural humidity was greatly increased, at this time, by the excessive rains, which began earlier and with much more violence than usual. The French position was neither so low nor so wet as that of the Spaniards. It had the advantage, moreover, of being supported by a well-peopled and friendly country in the rear, where lay the large towns of Fondi, Itri, and Gaeta; while their fleet, under the admiral Prejan, which rode at anchor in the mouth of the Garigliano, might be of essential service in the passage of the river.