The campaign of 1828 came to an end with the surrender of Varna. Though the Russians had been able to capture two of the four fortresses which barred their way to the Balkans, the campaign had not been without success to the Turks. They had shown unexpected powers of resistance, and had prevented for a year the achievement of the main object of the Russians—their advance to Constantinople. The losses of the Russians had been very great, not only in the sieges, but by disease, which dogged their armies as usual. Baron von Moltke, the German general, who, at the invitation of the Sultan, was with the Turkish headquarters during this war, writes of the Russian and Turkish troops in his remarkable history of it:— The faults of the Russian Staff were atoned for by the innate excellence of the Russian troops. The self-sacrificing obedience of the commanders, the steadiness of the common soldiers, their power of endurance and unshaken bravery in times of danger, were the qualities that enabled them to avert the dangers of their position before Schumla and to hold the Turks in check, and to make up for all deficiencies and overcome all resistance at Varna.[32] Of the Turks he adds:— We cannot say much for the skill of the Turkish commanders, but the conduct of the Turks, from the highest officers to the last soldier at the storming of Ibrail, their courage and steadiness in the mines and trenches before Varna, were far above all praise. In Asia the Turks had not done so well. General Paskiewich was able to defeat the army in front of him and to capture the important stronghold of Kars and its adjoining district. The campaign of 1829 began late. It was not till the middle of May that the Russian army again took the field, not on this occasion under the Czar, but under General Diebitsch, who proved to be a most able general and diplomatist. The army was again most inadequate for the campaign which was in contemplation—namely, the crossing of the Balkans and an advance to Constantinople. It consisted of no more than sixty-eight thousand men, a force which, in these days, eighty-eight years later, would count for little or nothing. It was thought necessary, as a condition precedent to any advance, to capture Silistria. The siege was commenced on May 17, 1829. The Russian force detailed for this was not more than fourteen thousand men. The Turks who defended it were twenty-one thousand in number, including eight thousand armed inhabitants. In spite of this disparity of numbers, the town was captured after a siege of forty-four days, on July 26th, at a loss to the Russians of two thousand five hundred men.