Royal Navy Submarines vs Axis Warships: WWII in every theatre, Patreon Premier

The Royal Navy submarine service developed an identity around intelligence gathering and ambush, supported by wartime experience and demanding command training.

Tribal destroyer crews and the SAS illustrate how elite reputations gave servicemen concrete expectations about the jobs they were supposed to perform.

Britain began both world wars with roughly sixty submarines, yet the service expanded, absorbed heavy losses, and fought from Norway and the Mediterranean to the Far East.

Submarine secrecy leaves gaps in Cold War history, including a proposed reconstruction of boats recording machinery and propeller signatures inside enemy base perimeters.

Early-war orders emphasized enemy warships and reporting rather than unrestricted attacks on merchant traffic, reflecting capture opportunities, alliance-building, and fears of friendly-fire losses.

Hard lessons from earlier torpedo and shell failures pushed the Royal Navy to protect weapons testing during the interwar years, giving its early-war submarines reliable tools.

HMS Truant exploited Karlsruhe's predictable route out of Kristiansand, placing a T-class submarine where its heavy bow salvo could punish the German invasion of Norway.

Karlsruhe lost engines, generators, and pumping capacity after one torpedo hit, leaving a disputed choice between towing the damaged cruiser and scuttling her.

After Karlsruhe, Truant rescued Norwegian sailors, survived a British friendly-fire attack, fought in the Mediterranean and Far East, and ended the war testing snorkel equipment.

Renaming Deutschland was intended to conceal a cruiser sale to the Soviet Union and avoid the propaganda risk of losing a warship named Germany.

Spearfish's torpedo damage to Lützow imposed a long repair burden and consumed scarce dockyard resources in Germany's small fleet.

Equal treaty submarine tonnage for Britain, the United States, and Japan raises two possible explanations: Japanese defensive needs and overconfidence in anti-submarine technology.

The compact U class combined shallow-water agility with economical construction, but Malta-based boats had to make every torpedo count when supply was uncertain.

Splendid's early Mediterranean patrols combined repeated torpedo attacks on submarines with deck-gun attacks when ammunition and escort strength allowed.

A six-torpedo attack on an Italian convoy missed its intended target but struck an escorting fleet destroyer twice, sinking the warship within seconds.

After landing SOE personnel, Splendid damaged the supply ship Emma, stayed close through the night, and attacked again in daylight to sink the ship.

Splendid's later patrols destroyed military cargo, including ammunition and vehicles, and gave her the leading British submarine tonnage total in those waters during the North African campaign.

Hermes forced Splendid to surface after three depth-charge runs; her wounded commander later escaped captivity and returned to Britain.

Decrypted Japanese signals supported the Ashigara operation, while incompatible radio equipment and commanders' responsibilities required coordination through several Allied headquarters.

Blueback's contact report helped Trenchant and Stygian prepare for Ashigara in Bangka Strait, where a Dutch minefield complicated their movements and Kamikaze encountered both boats.

A Royal Navy submarine commander's signal of intentions announced an action to be taken unless countermanded, a distinction that affects accounts of who authorized Trenchant's entry into Bangka Strait.

Ashigara chose a restricted passage that kept Trenchant at long range but left the cruiser too little room to evade an eight-torpedo salvo.

The S class balanced shallow-water utility, torpedo load, and buildability, making it an all-round submarine that could support both specialist boats and long-range operations.

Armour installation, lifting equipment, and internal subdivision help explain why wartime shipbuilding used several submarine and escort designs across different yards.

Upholder's 24 Malta patrols struck Axis troop movements and warships, earning Wanklyn the Victoria Cross and an unusually warm Admiralty tribute when the boat was lost.

Competing accounts of Upholder's disappearance depend on uncertain sightings and attack reports, including contacts that may never have been submarines.

Venturer's sinking of U-864 required hours of passive tracking and a calculated four-torpedo salvo against a zigzagging submarine beneath the surface.

Ten-torpedo salvoes and paired attacks let T-class submarines use the confusion of one strike to cover withdrawal and prepare the next.

Earlier U-class procurement might have reduced the need to move large T-class boats from the Far East into Mediterranean waters poorly suited to them.

Umbra's destruction of the ammunition-laden Silberg left an escorting aircraft unaccounted for, creating a possible but unlikely claim that a torpedo had also brought down an aircraft.