1070 Manuel Comnenus takes command against the Turks. Alp Arslan captures Manzicert. Romanus returns to the command.
1071 Byzantine expedition to Sicily defeated by Normans. Surrender of Bari. End of the imperial authority in Italy. Romanus taken prisoner by Alp Arslan at Manzicert. Restored to liberty and makes a treaty of peace. Refused admittance to Constantinople. Michael VII regains power reigning conjointly with Constantine XII. Romanus blinded, dies of his wounds.
1072 Alp Arslan, unable to obtain payment of Romanus’ ransom, invades empire. He finally conquers the Byzantine part of Asia Minor, giving it to Suleiman to rule.
1074 Rebellion of Ursel. Treaty with the Turks.
1076 The Turks take possession of Jerusalem.
1078 Bryennius attempts to gain the throne. After a severe struggle Michael abdicates in favour of Nicephorus (III) Botaniates.
1081 Nicephorus, after a constant struggle with many aspirants, is dethroned by Alexius (I) Comnenus after the capture and sack of Constantinople. Many pretenders are put down. Treaty of peace with Suleiman. Defeat of Alexius by Robert Guiscard.
1084 Defeat of Bohemond, the Norman leader. Relief of Larissa.
1085 Alexius recovers Dyrrhachium from the Normans.
1087-1099 Patzinak war ending in imperial victory at Levounion.