Le Braye du Valle was drained and reclaimed in 1806 by the British Government as a defence measure.
New roads were built and main roads metalled for ease of use by the military.
During the First World War, about 3,000 island men served in the British Expeditionary Force.
During the Marian persecutions, three women, the Guernsey Martyrs, were burned at the stake for their Protestant beliefs.
During the English Civil War, Guernsey sided with the Parliamentarians.
It lies roughly north of St Malo and to the west of the Cotentin Peninsula.