History of Guernsey St Saviour, St Pierre du Bois, Ste. Marie du Catel, and the Vale. The loss of Normandy by King John in 1204 isolated the Channel Islands from mainland Europe. Each time England and France went to war over the coming centuries, trade to and from the Channel Islands was restricted or banned and even when not officially at war, the island was repeatedly attacked by continental pirates and naval forces. Fortifications were improved in the Channel Islands, manned by professional soldiers and the Guernsey militia who would help to defend the Island for the next 600 years. Service was compulsory
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