'Chettyford' was the Allied tactical deception undertaking, within 'Oakfield', in support of the Allied 'Shingle' landing at Anzio (December 1943/January 1944).

The 'story' promulgated by 'Chettyford' was that the Allies were reorganising General the Hon. Sir Harold Alexander’s 15^th Army Group in January 1944 with a view to a continued defensive by Lieutenant General Mark W. Clark’s US 5^th Army on the western side of Italy, though detaching formations for use in a landing in the area of Pisa in northern Italy, while General Sir Bernard Montgomery’s British 8^th Army on the eastern side of Italy prepared for an advance along the coast of the Adriatic Sea to link with a beach-head established in north-eastern Italy by an amphibious assault near Rimini.

Lieutenant General George S. Patton undertook a well-publicised visit to units based around Cairo, and a number of double agents were used to misinform the Germans that a major invasion of the Balkans was also planned under Patton’s command.