824: Mention of the duchy of Chaldia (according to a view, the region can be considered a theme from that time)
Between 820 and 842: Most probable dates of the establishment of the theme
867-868: Rebellion of John the Chaldian
923: Rebellion of Bardas Boilas, Hadrian the Chaldian and Tatzates
1091-1095: Rebellion of Theodore Gabras
1103-1106: Rebellion of Gregory Gabras
1123-1126: Rebellion of Constantine Gabras