German fortification of Guernsey reduce the number and quality of troops required to defend the western ocean areas. Whilst the Luftwaffe and Kriegsmarine had their roles in protecting the islands from the Allies, the occupying forces put their main effort into land defences aimed at repelling a seaborne or airborne assault. The resulting construction work in the Channel Islands was extensive; it required thousands of workers and massive supplies of cement and steel. Tiny Guernsey received special treatment. It had the largest artillery pieces in the Channel Islands, tanks, and 12,000 troops: one soldier for every two civilians on the island, compared to France
History of Guernsey and Jersey were given certain privileges as the English crown needed the Islands to be loyal, not least of which was the Islands neutrality, allowing trade to be pursued with France and England, even when these were at war. The trade creating revenue from taxes to pay for the Island garrisons. During the English Civil War, Guernsey sided with the Parliamentarians, while Jersey remained Royalist. Guernsey's decision was mainly related to the higher proportion of Calvinists and other Reformed churches, as well as Charles I's refusal to take up the case of some Guernsey seamen who had been captured by