Near Nisch the army of twelve thousand chosen cavalry under Hunyadi was joined by that of Ladislaus, consisting of twenty thousand men, with whom were the king and the cardinal. The first and most important battle of the campaign with the united army was fought between Sofia and Nisch, probably near Slivnitza on November 3, 1443. The Turks were completely defeated, and thirty thousand of them are said to have been left on the field. Four thousand were made prisoners and nine standards captured. Thereupon the Christian army advanced to Sofia, which it captured, and then pushed on towards Philippopolis. At Isladi near Ikhtiman, the beginning of the pass about midway between Sofia and Philippopolis, Hunyadi found that Murad had arranged for making a stand. The natural strength of the pass, the principal entrance to which is the Gate of Trajan, and the measures taken on the high tableland at the head of this pass to make the frozen ground impassable to cavalry, made Hunyadi hesitate. A second pass appeared more practicable. On Christmas Eve, the Christian army forced a passage, triumphing over the Turks and over the equally serious obstacles of rocks and ice. Murad’s strong entrenchments were carried by brilliant and persistent attacks, the Christians having to make their way through snowdrifts, while the enemy rolled rocks and masses of ice from the heights. The Turks were driven from their stronghold and the Christian army followed them down the slopes of the Balkans into the plain. Once more the Turks stood, and again they were beaten.[137] Upon this, the triumphant Christian army halted and waited for reinforcements before further advance. It was probably immediately after this campaign, or possibly during the halt in Roumelia, that Murad hastened into Asia, where the prince of Caramania had engaged in a conspiracy with others of the emirs of Anatolia to rise against the sultan and to attack his territory simultaneously with the attacks made by Christians in Europe. Konia and many other cities had been sacked and desolation carried far and wide even among the Turks wherever they had stood for Murad.[138] The sultan suppressed the rising with his usual cruelty, treating the Turks as he had done the Christians. [Sidenote: Peace solemnly accepted.]