World War I was the greatest disaster in human history, claiming tens of millions of lives and destroying four empires, including the Russian one. And although whole mountains of books have been written about this tragedy, heated debates about its causes, results and alternatives continue to this day, and many issues to this day do not have an unambiguous solution. And the main one: could Russia win the war? Is it true that the Russian Empire fell literally one step away from its greatest triumph? If the revolution had not happened, would our army have managed to overturn the German front in the summer of 1917, and the fleet would have carried out a successful landing on Constantinople? Did we have any real chances to win? This book answers the most difficult and controversial questions of Russian history, restoring a holistic picture of the last war of tsarist Russia.