 A secure lodgement would be established and an attempt made to hold all territory captured north of the Avranches-Falaise line during the first three weeks.The Allied armies would then swing left to advance towards the River Seine.The invasion fleet, led by Admiral Sir Bertram Ramsay, was split into the Western Naval Task Force (under Admiral Alan G Kirk) supporting the American sectors and the Eastern Naval Task Force (under Admiral Sir Philip Vian) in the British and Canadian sectors.