The movement was brought to a fortunate conclusion by the French advance, before which the Austrians withdrew to secure a position. In the last days of April Moreau found himself with only twenty-five thousand men facing the mass of the Austrians under Kray at Engen. In the rear, on his left, but beyond reach, was a division of his own army under Saint-Cyr. On May second, expecting their speedy arrival, he joined battle with his inadequate force. The reinforcements did not arrive; but after a desperate fight, with serious loss, he defeated the enemy. Next day Saint-Cyr came in, and the Austrians, having learned that Stockach with its abundant stores had fallen into the hands of the French division under Lecourbe, withdrew northeastward toward the Danube. Moreau's success was unqualified. Kray could no longer retreat toward the Tyrol by Switzerland and the Vorarlberg; he had also lost a large supply of munitions most precious to their captors, besides five thousand prisoners and three thousand killed. Nevertheless, he was still undismayed, and two days later made a stand at Messkirch. After an embittered and sanguinary conflict on May fifth he was again defeated. The victory of Moreau would have been overwhelming but for a second inexplicable failure of Saint-Cyr to bring his division into action. Investigation revealed that while that division general had displayed no zeal and had evinced no good will in the interpretation of orders, he had strictly obeyed their letter. His laxity was therefore overlooked. It was soon found that the Austrians were again gathered to defend their depots at Biberach. This time Saint-Cyr was ardent, and with conspicuous fire he led his inferior numbers against the enemy's center, driving them from their position. Still aglow with victory, he then called in a second division under Richepanse, and attacking again the main body of the enemy's army, which was drawn up on the slopes of the Mettenberg, dislodged them from that position also. Two days later Lecourbe captured Memmingen with eighteen hundred prisoners, and on the tenth the Austrians withdrew to make a determined stand on a fortified camp at Ulm. It is probable that in two days Moreau would have driven them from that position if his force had been left intact; but Carnot had come in person to ask for the detachment of Lecourbe's corps to serve in Italy, and a request from such a man could not well be denied.