Leo Tolstoy then spent much of his time in Moscow, Tula and Saint Petersburg, leading a lax and leisurely lifestyle. He began writing during this period, including his first novel "Childhood", a fictitious account of his own youth, which was published in 1852. In 1851, after running up heavy gambling debts, he went with his older brother to the Caucasus and joined the army. Tolstoy served as a young artillery officer during the Crimean War and was in Sevastopol during the 11-month-long siege of Sevastopol in 1854–55, including the Battle of the Chernaya. During the war he was recognised for his bravery
War and Peace novel started to gain popularity with the European readership. The first French edition of the "War and Peace" (1879) paved the way for the worldwide success of Leo Tolstoy and his works. Since then many world-famous authors have praised "War and Peace" as a masterpiece of the world literature. Gustave Flaubert expressed his delight in a January 1880 letter to Turgenev, writing: "This is the first class work! What an artist and what a psychologist! The first two volumes are exquisite. I used to utter shrieks of delight while reading. This is powerful, very powerful indeed." Later John Galsworthy called