Wolf Pack Tactic:

The Wolf Pack or “Rudeltaktik” as the Germans called it was made famous by Karl Donitz and was to have a devastating impact on allied shipping. Despite being implemented only after the fall of France, the origins of this idea first dated back to the First World War. During the First World War, the British had defeated the U-boats by introducing the convoy system. This called for the formation of a group of ships to sail together as a group and under the protection of escort warships. Under the convoy system, U-boats could no longer find isolated easy targets scattered all over. The few U-boats who managed to find a convoy had difficulty attacking as it was escorted by antisubmarine vessels.

The wolf pack tactic was devised to defeat the convoy system. The idea was to form a pack of U-boats, and to delay an attack until all boats were in position to conduct a massed organized attack. This would overwhelm the escorts as the sheer number and surprise of the attacking boats would throw the defense into disarray. The first boat to make contact was designated as the “shadower” – whose job was to maintain contact and to report the convoy’s position. The shadower would remain out of the visible range of the convoy, often submerging by day and traveling on the surface by night. When enough boats have converged with the convoy, an attack started, usually after dusk where the U-boats’ small silhouette made detection difficult.

In the attack, each individual commander was free to use any tactics. Some fired at long range, outside the perimeter of the escorts, with a spread of several torpedoes. Some, particularly Otto Krteschmer headed straight into the center of the convoy, and fired at point blank range, picking off ship by ship as they sailed passed. Whichever tactics employed, the general strategy was to attack by night, and withdraw by day, with continuous attacks lasting several days, as more boats arrived on the scene.

This had devastating effects and easily overwhelmed the escorts. When an escort pursued one U-boat, another would attack at a different location, creating total chaos. Kretschmer later wrote in his war diary describing the attack on a convoy, “The destroyers are at their wit’s end. Shooting off star shells the whole time to comfort themselves and each other.”

Wolf Pack operations inflicted heavy losses. Tonnage figures skyrocketed, and soon reached an all time high. One of the most famous Wolf Pack attacks took place between the nights of October 16th to the 19th, 1940. Convoy SC7 was repeatedly attacked by a pack of seven boats, sinking 20 ships out of 34 in the convoy. The very next night, convoy HX79 was attacked with further losses of 14 ships, making a total of 34 ships in 48 hours. These attacks mounted against the two convoys became to be known as “The Night of the Long Knives”.

Although the idea originated as early as World War One, but many shortcomings prevented the implementation of this tactic. First, U-boats were dispersed far out across the oceans and Germany lacked the powerful radio transmitters needed to communicate with the boats. Second, there was no governing body which was needed to co-ordinate the attacks.  After the First World War, and after Donitz had been appointed as commander of the U-boat Force, he had refined the Wolf Pack strategy and worked out the theoretical elements.

In the beginning of the Second World War, the Wolf Pack tactic still could not be implemented due to an insufficient number of boats and the lack of powerful radio transmitters. This, however, was to change after the fall of France. With the collapse of France, Germany now had control of powerful land based transmitters on the coast of France, which were perfectly capable of sending messages to U-boats across the Atlantic. Also by this time, Donitz had a small fledgling of U-boats and thus was able to begin Wolf Pack tactics from July 1940 onwards.

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