Just north of Turkey lies the Black Sea, a roughly peanut-shaped saltwater lake the size about the size of Arizona and New Mexico combined. The Crimean Peninsula juts out into the Black Sea from the north, on which sits the port city of Sevastapol. In 1853, the weakening Ottoman Empire controlled the area known as the Crimea, but Russia, sensing weakness, sent troops into the region in July of that year. Britain and France, hoping to deny the growing Russian Empire the valuable port city, sent warships and troops to aid the Ottomans, signalling the beginning of the Crimean War.