Count Lev Nikolayevich Tolstoy, usually referred to in English as Leo Tolstoy, was a Russian novelist regarded as one of the greatest of all time. He is best known for War and Peace (1869) and Anna Karenina (1877). He first achieved literary acclaim in his 20s with his semi-autobiographical trilogy, Childhood, Boyhood, and Youth (18521856), and Sevastopol Sketches (1855), based upon his experiences in the Crimean War. Tolstoy's fiction includes dozens of short stories and several novellas such as The Death of Ivan Ilyich, Family Happiness, and Hadji Murad. Tolstoy also wrote plays and numerous philosophical essays.