Russian Empire
Though the Empire was only officially proclaimed by Tsar Peter I following the Treaty of Nystad (1721), some historians would argue that it was truly born either when Ivan III of Russia conquered Veliky Novgorod in 1478, or when Ivan the Terrible conquered the Khanate of Kazan in 1552. According to another point of view, the term "Tsardom", which was used after the coronation of Ivan IV in 1547, was already a contemporary Russian word for empire.
Military history of the Russian Empire
The military history of the Russian Empire encompasses the history of armed conflict in which the Russian Empire participated. This history stretches from its creation in 1721 by Peter the Great, until the Russian Revolution (1917), which led to the establishment of the Soviet Union. Much of the related events involve the Imperial Russian Army, Imperial Russian Navy, and from the early twentieth century, the Imperial Russian Air Service.