In compliance with the treaty of Tilsit, Russia suspended hostilities with the Porte. But the Russian army remained in occupation of Wallachia and Moldavia, and showed no intention to evacuate them. War was renewed in 1809. Prince Bagration, at the head of a Russian army, crossed the Danube and captured several Turkish fortresses on its right bank. In the following year, 1810, the Russians captured the important stronghold Silistria, but failed with very heavy loss in an assault on Rustchuck. Later in the year they inflicted a severe defeat on the army of the Grand Vizier at Baltin. They then succeeded in a second attack on Rustchuck, and captured Sistova. But they failed to take the fortified camp at Schumla, and were unable therefore to cross the Balkan range. In 1811 war was again imminent between Russia and France, and the Russian generals on the Danube received orders to stand on the defensive. The Turks took advantage of this, and sent a large army across the Danube. It was eventually defeated and compelled to surrender. In spite of their successes, the Russians were willing to come to terms. They had hitherto insisted on the retention of Wallachia and Moldavia. They were now ready to make concessions. The invasion of Russia by Napoleon was imminent. It was necessary for the Czar to concentrate all his forces in defence of his own Empire. Negotiations were commenced in 1811, and they resulted in the treaty of Bucharest of May 28, 1812. It was agreed that the River Pruth was to be the new boundary between the two Empires. The whole of Wallachia and a great part of Moldavia were restored to Turkey. Bessarabia and a part of Moldavia were ceded to Russia. The treatment of Serbia in the treaty was ungenerous on the part of Russia. An amnesty was to be granted to its people. They were to be secured in future the regulation of their internal affairs. But the supremacy of the Sultan was to be maintained, and Belgrade and other fortresses which had been captured by the Serbians were again to be garrisoned by Turkish troops. This last was the cause of great troubles in the future. But for the impending invasion of Russia by Napoleon the terms would undoubtedly have been far less favourable to the Porte. XIX MAHMOUD II 1808-39