Which works is based on leo tolstoy’s time serving in the crimean war and set in the city where he and his military unit were based

The correct answer is Sevastopol Sketches.

Explanation:

Sevastopol Sketches or Sebastopol stories are three short autobiographical stories where Leo Tolstoy describes his personal experience when he participated at the Siege of Sevastopol, during the Crimean War.  

Sevastopol is the name of a city in Crimea, where Tolstoy was an officer in the Russian army. His war experience helped him to shape an authentic writing style and provided him with realistic content which he often uses as descriptions of war in his later work (e.g. War and peace).

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