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.
Foreign policy of the Russian Empire
To build up a presence on the Pacific Ocean, Russia seized some 400,000 square miles of almost uninhabited territory from Qing dynasty China in 1858–1860. It sent in settlers and prisoners, so that its holdings from Vladivostok north along the Sea of Japan reached 310,000 in 1897. Russia established an economic role east into the Sinkiang and Manchuria regions of China peacefully, using the Treaty of Saint Petersburg (1881), loans to the Chinese government, networks of merchants, and by building the Chinese Eastern Railway, a branch of the Trans-Siberian railroad, through Manchuria to the ocean. Meanwhile, in the late 19th century, the Empire of Japan was expanding into Manchuria and especially Korea. It proposed a deal whereby the Russians would have the predominant role in Manchuria, and Japan in Korea. The tsar, contemptuous of the Japanese, bluntly refused. In the Russo-Japanese War, Japan attacked, pushing back the Russian army on the ground, and sinking the main Russian battle fleet. Japan took control of Korea and of the southern half of the Chinese Eastern Railway.