ナルヴァ川
In the 12th century, Western Ingria was absorbed by the Republic. There followed centuries of frequent wars, chiefly between Novgorod and Sweden, and occasionally involving Denmark and Teutonic Knights as well. The Teutonic Knights established a stronghold in the town of Narva, followed by the Russian castle Ivangorod on the opposite side of the Narva River in 1492.