Meanwhile, COSSAC had been working on its own deception strategy, "Appendix Y" of Operation Overlord plan. The plan, also known as Torrent, had originated in early September at COSSAC and started life as a feint invasion of the Calais region shortly before D-Day and eventually, after the failure of a similar scheme during "Cockade", transformed into a plan to divert attention from troops building up in the south-west of England. The early ideas, which later became Operation Bodyguard, recognised that the Germans would expect an invasion. Instead, the core of the plan suggested misleading the Germans as to the exact time and location of the invasion and keeping on the back foot once it had landed.