The British Invasion of Madagascar: ‘Extraneous and Unnecessary’ or ‘A Model for Amphibious Descents’?

Abstract This article examines the little-known British invasion of Madagascar in 1942. It assesses the evolving strategic debate over the decision to invade, arguing that it was sound and not ‘extraneous and unnecessary’, in light of reasonable concerns that the Vichy government could provide Japan with bases that would threaten vital sea communications. It then analyses the planning and conduct of Operation Ironclad (May) and Operation Streamline-Jane (September). It demonstrates how the commanders were able to shape their plan according to the political objectives and the constraints imposed on them and explains their success in both. Finally, it discusses how the operation materially advanced the development of Allied amphibious warfare capabilities, showing that it was indeed a ‘model for amphibious descents’.