Which Tolstoy novella follows the young nobleman Dmitry Olenin in the Caucasus?

The Tolstoy novella that follows the young nobleman Dmitry Olenin in the Caucasus is The Cossacks.

Tolstoy began writing The Cossacks after serving in the Caucasus and drawing on his observations of the region’s military frontier communities. The work was published in 1863, though Tolstoy had been developing it for years.

Dmitry Olenin leaves Moscow and enters a world shaped by Cossack customs, military life, local identities, and the natural landscape. His attempt to find authenticity away from aristocratic society becomes complicated by his attraction to Maryanka and by his inability to fully belong.

The Cossacks is sometimes confused with Hadji Murat, another Caucasus-related Tolstoy work. The central character Olenin belongs to The Cossacks, while Hadji Murat is based on a historical Caucasian leader.