'Broadsword' (i) was a British unrealised deception operation within 'Cockade' (September 1943).

The undertaking was planned as 'Domesday', then revised as 'Broadsword' (i) and finally implemented as 'Starkey'. The operation was based on the notional 'story' of an attack by British and Canadian forces, totalling no fewer than 14 divisions, which would land on each side of Boulogne on the north coast of German-occupied France, and establish a consolidated lodgement.

A related operation was 'Leyburn'.