Two hundred and fifty chasseurs a cheval of the 14th regiment, a hundred and fifty artillerymen, and three hundred soldiers of the royal regiment of foreigners, were drawn from their respective garrisons; and formed, with the royal volunteers, an army of twelve thousand men; which must necessarily be increased by the levies daily made in the provinces, that continued subject to the royal government, and by the succours, which the Prince had hastened to demand from the King of Sardinia, and from Switzerland, and which he hoped to obtain from them. The Duke of Angouleme divided his army into two corps. The first, commanded by General Ernouf, under whose orders were Major-Generals Gardanne and Loverdo, proceeded through Sisteron for Grenoble. The second, commanded by the Prince in person, and under his orders by Lieutenant-general Monnier, Baron Damas, and Viscount Descars, took the road of Valence. These two corps, after having reduced the country to submission, and rallied the royalists, were to join at Grenoble, and march together to Lyons. The advanced guard of the second corps, conducted by M. Descars, met no serious resistance, till it came to pass the Drome. General De Belle, at the head of a few hussars of the 4th, a battalion of the 39th, and about eight hundred national guards, had suffered himself to be driven from Loriol, and retired as well as he could behind the Drome. The volunteers of Vaucluse, covered by the royal artillery, forded the river, and came and took post on the left flank of the national guards. At the same moment the Prince directed the 10th of the line, to attack the bridge. This manoeuvre did not intimidate the national guards; they stood firm; and the 10th, notwithstanding the ardour, with which it was inspired by the example of the Duke of Angouleme, was on the point of giving way; when several of the light infantry, who were at their head, discovered among their antagonists some of their ancient comrades. They began with a mutual cessation of firing, and finished with embracing amid shouts of Long live the Emperor. During this conversation and embracing, the rest of the 10th regiment recovered ground. The imperials, supposing they were coming to join them, advanced without distrust: a volley undeceived them: the troops of General De Belle were thrown into disorder, he made no attempt to rally them, and the rout became complete. Part of the imperials were made prisoners by the royalists; others took refuge in the mountains, or went to carry the news of their defeat to Grenoble or Valence. The next day, the 3d of April, the Duke of Angouleme and his victorious army entered Valence, and proceeded without loss of time to Romans on the Isere.