In response this latest change of mind by the Ottomans, the Russians on 2 July 1853 occupied the Turkish satellite states of Wallachia and Moldavia, as they had during the Russo-Turkish War of 1768–1774. Almost immediately, the Russian troops deployed along the northern banks of the Danube River, implying that they might cross the river. Aberdeen ordered the British Fleet to Constantinople and later into the Black Sea. On 23 October 1853, the Ottoman Empire declared war on Russia. A Russian naval raid on Sinope, on 30 November 1853, resulted in the destruction of the Turkish fleet in the battle of Sinope. When Russia ignored an Anglo-French ultimatum to abandon the Danubian provinces, Britain and France declared war on Russia on 28 March 1854. In September 1854, British and French troops landed on the Crimean peninsula at Eupatoria, north of Sevastopol. The Allied troops then moved across the Alma River on 20 September 1854 at the battle of Alma and set siege to the fort of Sevastopol.