 Complete the following phrase:  In October 1939, Commander-in-Chief, Home Forces, General Walter Kirke, was tasked with drawing up a defensive plan to defend the United Kingdom from a German invasion, which was codenamed Julius Caesar. The divisions assigned to this defensive plan were constantly changing, and, by May 1940, included the 66th Division. The division replaced the 49th West Riding Infantry Division in Northern Commands part of this plan, and as a result moved from positions around Manchester into Yorkshire. The divisions role was to launch an immediate attack on German parachutists, or failing that, to cordon off and immobilise any German invasion effort, until relieved by forces capable of launching a counter-attack to defeat the Germans. On 9 April, following the 