The joined forces of Manuel and Amalric laid siege to Damietta on 27 October 1169, but the siege was unsuccessful due to the failure of the Crusaders and the Byzantines to co-operate fully.
Manuels og Amalrics forenede styrker belejrede Damietta den 27. oktober 1169, men belejringen lykkedes ikke som følge af at byzantinerne og korsfarerne ikke forstod at samarbejde fuldt ud.