The next king, Ashurnasirpal II (883-859 BC), embarked on a vast program of expansion. During his rule, Assyria recovered much of the territory that it had lost around 1100 BC at the end of the Middle Assyrian period. Ashurnasirpal II also campaigned in the Zagros Mountains in modern Iran, repressing a revolt against Assyrian rule by the Lullubi and Gutians. The Assyrians began boasting in their ruthlessness around this time. Ashurnasirpal II also moved his capital to the city of Kalhu (Calah/Nimrud). The palaces, temples and other buildings raised by him bear witness to a considerable development of wealth and art. Ashurnasirpal II introduced a policy of mass deportation of conquered people, which continued on a greatly increased scale under his son, Shalmaneser III.