wrote a very powerful novel, "War and piece". Once a Russian told me it was a novel for teenagers, but I think she was wrong...
And "a canticle for Leibowitz" is very good.
You can also look at the works of Milos Tsernianski, who is called the Serbian Tolstoi. Many wars in his novel "Migrations", from the XVIII° century wars of the Austrians against Turks to the First World War. Maybe he has been translated into English.