Which Leo Tolstoy novella was published posthumously in 1912?

Hadji Murat was the Leo Tolstoy novella published posthumously in 1912. Tolstoy wrote it mainly in the late 1890s and early 1900s, but it was not released during his lifetime.

The story is based on the historical Caucasian commander Hadji Murat, who broke with Imam Shamil and sought an alliance with the Russian authorities. Tolstoy presents the conflict through political maneuvering, military violence, and the personal dignity of its central figure.

The novella is sometimes confused with The Cossacks, another Tolstoy work set in the Caucasus. Hadji Murat is much later and draws directly on a nineteenth-century historical figure and the Russian conquest of the region.