Grand Duchy of Moscow (Principia Moderni III Map Game)

The Grand Duchy of Moscow (Russian: Великое Княжество Московское, Velikoye Knyazhestvo Moskovskoye) or Grand Principality of Moscow (also known in English simply as Muscovy) is a mid-evil state of the Rus' and Far-Eastern Europe. Known for it's revolution against the Polish Lithuanian Union shortly after the beginning of the 15th century. With support from the Teutonic Order (Now Prussia) and a large portion of the Holy Roman Empire, it has annexed half of East Slavic Lithuania, and has a created a vassal previously known as Ukraine. By the year 1405, the Grand Duchy of Moscow has doubled it's territory, but at the price of it's vassals of the Principality of Ustyug which was acquired by the 1420s and the Republic of Pskov. Although, previously being a backwater state within Eastern Europe and home to the Metropolitan and the Curia of the Eastern Orthodox Church, it has prevailed through tough wars and exponentially reunited with their East Slavic and Orthodox brethren in the Rus' by the end of the beginning of the 15th century.