Operation Appendix Y

This was the Allied interim designation for the cover and deception operation originally designated as 'Torrent' and itself replaced by 'Mespot' and 'Fortitude', to support 'Neptune' (iii) and 'Overlord' (spring/summer 1944).

Created under the auspices of the COSSAC (Chief-of-Staff Supreme Allied Commander) team, the plan was intended to suggest a major amphibious landing by a force of six divisions in the region of the Pas de Calais on the north-east coast of German-occupied France.