An Introduction to Operation Ironclad: May 1942 Invasion of Madagascar

Madagascar sat beside the Cape route carrying supplies to India, Persia, Burma, Australia, and the wider Allied war effort.

Fear of leaks and doubt that Vichy forces would resist Japan led British planners to keep the Free French outside Ironclad's advance planning.

The initial operation aimed to seize Diego Suarez and its airfield rather than conquer all of Madagascar at once.

Carriers, cruisers, destroyers, corvettes, minesweepers, a monitor, and a seaplane carrier gave the invasion fleet broad capabilities.

The heavy naval cover was meant both to overawe Vichy resistance and to meet a possible Japanese strike into the Indian Ocean.

Assault transports, a converted tanker, an early LST, troopships, and stores ships carried both the landing force and its staying power.

A reinforced force of commandos, infantry, armor, and later divisional troops was chosen for speed, discipline, and defensive strength.

Carrier fighters and strike aircraft covered the assault, while Albatross and Erebus preserved reconnaissance and gunfire support if the fleet had to move.

Syfret commanded the overall force, Drew directed the amphibious shipping, and Sturges led the troops ashore.

Drew linked detailed staff planning to command of the ships that executed the landing.

Allied command of surrounding waters let naval forces isolate Diego Suarez and concentrate combat power on a narrow objective.

Commandos and infantry advanced on separate routes, securing ground and flanks as they pushed toward Diego Suarez.

A quick seizure of Diego Suarez prevented Madagascar from draining forces needed for North Africa while preserving a response to Japan.