WW2 "Julius Caesar" Plan?

In The Defence of the United Kingdom by Basil Collier (HMSO, 1959) the author refers to the "Julius Caesar" Plan in relation to the plans for the denence of the UK following the fall of France in WW2. Does anyone know anything about this? Google is hard to filter as there is a load of trash about teaching the Romans as part of the school syllabus ...



War Hero
The only thing I could find is this:

Research of the documents relating to the Second World War was aimed at adding contextual information by way of photographs and illustrations of the many known military structures that survive in Shetland. One such illustration was drawn up by GHQ on 27th October 1939 and shows Shetland as part of the Julius Caesar Plan. This reflects a contingency plan for the defence of a large scale invasion. The Julius Caesar plan considered that land forces would not be hugely significant as Naval and Airforce strength were superior to that of Axis.

Taken from this document: http://www.shetland-museum.org.uk/whats_new/Hentins4.pdf

It may give you some leads?
Well fpr one Julius wasnt a Roman!

However,the essence of the plan was to use Home Defences to force an invading army to concentrate in such large numbers that the RN and RAF could also concentrate their defence.An estimtated invasion of 10,000 troops might land on the orkneys and scottish isles however it was discounted and the likelyhood of Shetlands being invaded did not constitute a direct strategic threat.

The overall scheme called ZZ and known as "The Julius Caesar Plan" by Army Co-Op, but was renamed Operation Banquet on May 27th,which was the response to Operation Seelowe(invasion) by the Germans.

Instructions to civilians in the event of invasion were also detailed. A widely distributed leaflet dated June 1940 and entitled "If the INVADER comes" told the population how best to help the country and themselves. The seven sections can be summarised: 1) STAY PUT -if refugees block roads they will hinder our armies and you will expose yourself to danger if out in the open. 2) DO NOT BELIEVE OR SPREAD RUMOURS -make sure all orders are genuine, only believe officials you know by sight. 3) REPORT ANYTHING SUSPICIOUS TO THE POLICE OR MILITARY -but only facts, not vague rumours. 4) DO NOT GIVE ANY GERMAN ANYTHING, DO NOT TELL HIM ANYTHING -hide food, maps, bicycles and petrol, disable cars. 5) BE READY TO HELP THE MILITARY, BUT DO NOT BLOCKS ROADS UNLESS SO ORDERED - blocking roads can help prevent the enemy advancing, but it can also hinder our own forces. 6) FACTORIES SHOULD ORGANISE TO RESIST A SUDDEN ATTACK - keep suspicious strangers out, have a chain of command in advance. 7) THINK BEFORE YOU ACT. BUT THINK OF YOUR COUNTRY BEFORE YOU THINK OF YOURSELF. Later instructions headed "Plans for Civilian Action in Invasion" (dated June 8th 1942) were not so widely distributed and were probably intended to be made known by word of mouth. These were even more detailed and included (Paragraph 6) If stray enemy marauders or small parties of enemy soldiers are moving about in an area not in effective occupation of the enemy the Government expects that every stout-hearted citizen will use all his powers to overcome them. Needless to say, a civilian should not set out to make independent attacks on enemy formations... Similar instructions went out to police, fire service personnel and those of the other civilian services and public utilities. For all the bottom line was that they should try to carry on with their jobs, not helping but not actively resisting the enemy. The fire service, for example, were instructed not to resist the enemy, and any arms which may have been carried for the purpose of guarding fire stations....should be surrendered. (The Duty of Fire Brigades in Case of Invasion. Paragraph 4).
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