The senior king ceded the lands between the Adriatic Sea and the Dráva River—Croatia, Dalmatia and Slavonia—to Béla in 1220.[12][16] A letter of 1222 of Pope Honorius III reveals that "some wicked men" had forced Andrew II to share his realms with his heir.[17] Béla initially styled himself as "King Andrew's son and King" in his charters; from 1222 he used the title "by the Grace of God, King, son of the King of Hungary, and Duke of all Slavonia".[13]