Kresy Wschodnie or simply Kresy (Polish pronunciation: [ˈkrɛsɨ], Borderlands or Eastern Borderlands) was a term coined for the eastern part of the Second Polish Republic during the interwar period (1918–1939). Largely agricultural and extensively multi-ethnic, it amounted to nearly half of the territory of pre-war Poland. Historically situated in the eastern Polish–Lithuanian Commonwealth, following the 18th-century foreign partitions it was annexed by Russia (except for its southern part, including Lviv, which was taken by the Habsburg Monarchy) and ceded back to Poland in 1921 after the Peace of Riga.