The grand vizier now marched directly along the river towards the czar. The two armies were very unequal in point of numbers: that of the Turks, which had been reinforced by the Tartarian troops, consisted of nearly two hundred and fifty thousand men, while that of the Russians hardly amounted to thirty-five thousand. There was indeed a considerable body of troops, headed by general Renne, on their march from the other side of the Moldavian mountains; but the Turks had cut off all communication with those parts. The czar's army now began to be in want of provisions, nor could, without the greatest difficulty, procure water, though encamped at a very small distance from the river; being exposed to a furious discharge from the batteries, which the grand vizier had caused to be erected on the left side of the river, under the care of a body of troops, that kept up a constant fire against the Russians. By this relation, which is strictly circumstantial and true, it appears that Baltagi Mahomet, the Turkish vizier, far from being the pusillanimous, or weak commander, which the Swedes have represented him, gave proofs, on this occasion, that he perfectly well understood his business. The passing the Pruth in the sight of the enemy, obliging him to retreat, and harassing him in that retreat; the cutting off all communication between the czar's army, and a body of cavalry that was marching to reinforce it; the hemming in this army, without the least probability of a retreat; and the cutting off all supplies of water and provisions, by keeping it constantly under the check of the batteries on the opposite side of the river, were manoeuvres that in no ways bespoke the unexperienced or indolent general. Peter now saw himself in a situation even worse than that to which he had reduced his rival, Charles XII. at Pultowa; being, like him, surrounded by a superior army, and in greater want of provisions; and, like him, having confided in the promises of a prince, too powerful to be bound by those promises, he resolved upon a retreat; and endeavoured to return towards Jassi, in order to choose a more advantageous situation for his camp. July 20, 1711.] He accordingly decamped under favour of the night; but his army had scarcely begun its march, when, at break of day, the Turks fell upon his rear: but the Preobrazinski regiment turning about, and standing firm, did, for a considerable time, check the fury of their onset. The Russians then formed themselves, and made a line of intrenchments with their waggons and baggage. The same day (July 21.) the Turks returned again to the attack, with the whole body of their army; and, as a proof that the Russians knew how to defend themselves, let what will be alleged to the contrary, they also made head against this very superior force for a considerable time, killed a great number of their enemies, who in vain endeavoured to break in upon them.