History of Russia
The war ended in 1721 when an exhausted Sweden sued for peace with Russia. Peter acquired four provinces situated south and east of the Gulf of Finland, thus securing his coveted access to the sea. There, in 1703, he had already founded the city that was to become Russia's new capital, Saint Petersburg, as a "window opened upon Europe" to replace Moscow, long Russia's cultural center. Russian intervention in the Commonwealth marked, with the Silent Sejm, the beginning of a 200-year domination of that region by the Russian Empire. In celebration of his conquests, Peter assumed the title of emperor, and the Russian Tsardom officially became the Russian Empire in 1721.
Ottoman Empire
The history of the Ottoman Empire during World War I began with the Ottoman surprise attack on the Russian Black Sea coast on 29 October 1914. Following the attack, Russia and its allies, France and Britain, declared war on the Ottomans. There were several important Ottoman victories in the early years of the war, such as the Battle of Gallipoli and the Siege of Kut.