Hoping still to reduce the fort before the arrival of Lord Rawdon, General Greene urged on the work of investment, and by every means in his power sought to weaken the garrison, so as to make victory certain when all was ready for the final assault. But before he had accomplished his task, a messenger from Sumter arrived with the unwelcome intelligence that Rawdon had succeeded in passing him and was pushing on rapidly for Ninety-Six. The crisis had now come. Greene must either hazard an assault upon the fort ere his works were in complete readiness, risk a battle with Rawdon, or retire over the Saluda, and thus give confidence and strength to the tories and royalist army. His first determination was to meet the relieving army under Rawdon, but every thing depending on his not giving the enemy, at this particular crisis of affairs in the South, a victory, and seeing that his force was much inferior to that of the British, he resolved to make an attack upon the fort, and, if not successful in reducing it, to retire with his army toward North Carolina before Rawdon came up. The 18th of June, 1781, was the day chosen for this assault. But made, as it was, with the besiegers' works incomplete, though the men fought with desperate courage, the fort was successfully defended, and General Greene ordered his troops to retire, after they had suffered the loss of one hundred and eighty-five killed and wounded. Nothing was now left but retreat. For some twenty-six days the besieging army had been at work before the fort, and in three days more all their arrangements would have been completed and the post have fallen into their hands. It was therefore deeply mortifying and dispiriting to be forced to retire, just as success was about crowning their efforts. But far-seeing, prudent, and looking more to future results than present triumphs, General Greene, on the 19th, commenced retreating toward the Saluda, which river he passed in safety, and moved forward with all possible despatch for the Enoree. Before his rear-guard had left the south side of this river, the van of Lord Rawdon's army appeared in pursuit. But the British commander hesitated to make an attack upon Greene's cavalry, which was under the command of Lee and Colonel Washington, and was a brave, well-disciplined, and superior troop, and so permitted them to pass the Enoree unmolested. While Lord Rawdon paused at this point, undetermined which course to pursue, General Greene moved on toward the Broad River, where he halted and made his encampment.