On 7 May 1941, Winston Churchill explained to the House of Commons why counting ships sunk could give a misleading picture of the Atlantic war. Britain could reduce its losses by keeping merchant ships in harbour. But ships safely at anchor would not bring in the imports the country needed. The essential measure was what reached Britain. B23
Cargo had to move, ships had to unload and sail again, and damaged vessels had to return to service. Churchill described building, repair and faster turnaround as parts of the same struggle. He was defending his government’s conduct of the war, and his assurances about future American help were expectations, not guarantees. Yet the dilemma he set out was real: protecting shipping could not mean stopping it. B23
This was the contest into which Bismarck would sail.
The target beyond the warships
The German general orders for the Atlantic operation placed merchant shipping at the centre of the mission, especially ships bound for Britain. They also acknowledged a difficulty that the size of a battleship could not solve: in an enormous ocean, finding a convoy with only a few raiders was uncertain. Ships sailing independently were targets too. B02
Bismarck and the cruiser Prinz Eugen were meant to work together. Against a convoy guarded by a battleship, the orders envisaged Bismarck occupying the escort’s attention while Prinz Eugen attacked from the other side. That opportunity depended on drawing the escort far enough away. A defender that stayed close to its convoy could frustrate the scheme. The orders survive here through a modern reproduction and translation; the underlying German original remains to be checked. B02
The distinction matters. A battle with British heavy ships could open a route to merchantmen, but winning such a battle was not itself the cargo-destroying operation Germany wanted. The useful question was what the raiders could do after they reached the trade routes—and what Britain would have to commit to stop them.
Watching the northern passages
The British picture developed through fragments. Admiral John Tovey’s later despatch recalls unusual German reconnaissance near Greenland and Jan Mayen, then photographs identifying a battleship and cruiser at Bergen on 21 May. An Atlantic raid was suspected; its route was still uncertain. B11
Tovey considered other explanations, including movements connected with Norway and a possible threat to Iceland. He judged a breakout against the trade routes the greatest danger and arranged his forces accordingly. Patrols had several passages to cover. Fog and low cloud obstructed reconnaissance over Norway, leaving uncertainty about whether the German ships had departed. B11
On a map, the North Atlantic can look like a space across which arrows simply advance. For the people conducting the search, a ship’s last reported position could already be hours out of date. Decisions had to be made before a complete picture existed.
Hood’s place in the response
HMS Hood was already a familiar symbol of British naval power, with a service history stretching back to 1920. In May 1941 she also had a practical task: to help intercept the German ships. B10
Tovey sent Hood and Prince of Wales towards Iceland with a destroyer screen. Elsewhere, the Admiralty cancelled the planned participation of Victorious and Repulse in convoy W.S. 8B and placed them at his disposal. Suffolk’s return to patrol was timed to conserve fuel. B11
These were choices about ships already needed for other duties, and about how long they could remain at sea. Bismarck’s significance lay partly in the effort required to contain her. The coming encounter would be fought between warships, but the reason for preventing her escape lay across the Atlantic, along the routes used by merchant crews.
The story begins with that tension: Germany seeking access to shipping, Britain trying to deny it, and both sides needing to find their enemy before they could act.