Buonaparte took the field in the beginning of March, advancing from Bassano.[265] The Austrians had an army of observation under Lusignan on the bank of the Piave, but their principal force was stationed upon the Tagliamento, a river whose course is nearly thirty miles more to the eastward, though collateral with the Piave. The plains on the Tagliamento afforded facilities to the Archduke to employ the noble cavalry who have always been the boast of the Austrian army; and to dislodge him from the strong country which he occupied, and which covered the road that penetrates between the mountains and the Adriatic, and forms the mode of communication in that quarter betwixt Vienna and Italy, through Carinthia, it was not only necessary that he should be pressed in front--a service which Buonaparte took upon himself--but also that a French division, occupying the mountains on the Prince's right, should precipitate his retreat, by maintaining the perpetual threat of turning him on that wing. With this view, Massena had Buonaparte's orders, which he executed with equal skill and gallantry. He crossed the Piave about the eleventh March, and ascending that river, directed his course into the mountains towards Belluno, driving before him Lusignan's little corps of observation, and finally compelling his rear-guard, to the number of five hundred men, to surrender. The Archduke Charles, in the meantime, continued to maintain his position on the Tagliamento, and the French approached the right bank, with Napoleon at their head, determined apparently to force a passage. Artillery and sharpshooters were disposed in such a manner as to render this a very hazardous attempt, while two beautiful lines of cavalry were drawn up, prepared to charge any troops who might make their way to the left bank, while they were yet in the confusion of landing.