Question

Map of the Decline of the Ottoman Empire. A key notes territory lost in 1600 to 1774, 1774 to 1830, 1831 to 1878, and the empire in 1878. From 1600 to 1774, the Ottomans lost area in Russia, Africa, the Middle East, and Austria. From 1774 to 1830 the Ottomans lost an island in the Black Sea. From 1831 to 1878 the Ottomans lost area in Austria, Africa, and near the Black Sea.
When did the Ottomans lose territory in Crimea?

between 1600 and 1774
between 1774 and 1830
between 1831 and 1878
after 1878

Answer 1

between 1774 and 1830

Specifically: the Crimean Khanate was detached from Ottoman control by the 1774 Treaty of Küçük Kaynarca and Russia formally annexed Crimea in 1783.