P.S. I think someone could make quite a good wee TL based on this... The Mann, where are you?
Canada-wanker in chief, reporting for duty.
Like its been said, Canadian BBs are hard to justify. I think dumping the Washington Naval Treaty would be the best bet - it was a godsend to the British, who couldn't easily give up control of the seas but was in economic trouble after the war and would have difficulty keeping up, particularly with the Americans. One could also conceivably butterfly away the Treaty of Versailles or make it a lot less constricting, thus allowing Germany to get back on its feet and arm itself much earlier than in OTL. Add the two together and you see a major problem coming from Britain. The Washington Naval Treaty being junked means the British have to keep up with the Americans, the French and (especially) the Germans, which means they need the G3s/N3s badly. To help justify the cost, the British look to give some of its older warwagons to its colonies. One capital ship serves a British colony (HMAS Australia), but others are soon wanted. Ottawa and Canberra aren't real keen on taking on obsolescent warships, and both want cruisers instead of battleships, noting that they make more sense for their budgets and manpower concerns. Britain does manage to convince them to take on a battlecruiser each, however. The colonies are offered Renown and Repulse, but both countries decide that they can afford, if they are buying one capital ship, to go full up and buy a G3. The Queen Elizabeth class vessels stay in commission in the RN, though in the 1920s these, too, are transferred to the colonies, resulting in battleships commanded by British officers but crewed by men from India, South Africa and Malaya, among others.
Britain makes a surprise in 1927 when they offer to transfer their Caribbean colonies to Canada's jurisdiction. This comes a year after the Balfour Declaration and two after the King-Byng affair, and its a surprise to Prime Minister King. After a long debate, King agrees to the idea. At first, the possessions transferred - including Jamaica, Trinidad and Tobago, Barbados and the British Leeward and Windward Islands - are referred as territories of Canada, a status which remains until they become full provinces in the early 1950s.
The addition of the new colonies provides a need for a stronger Navy, and Canada's G3, HMCS
Victorious, is delivered in 1929. It is by a margin the largest vessel ever to serve the RCN, but it is a respect-builder. It spends most of its time in the Atlantic, and but as the vessel can (just barely) fit through the Panama Canal, it makes fairly regular trips to the West Coast. Along with a growing fleet of Leander class cruisers and destroyers (four of the former are built by shipyards in Halifax, Vancouver and Saint John), Canada provides a major contribution to the British Empire's naval power. Britain's idea of battleships to the colonies proves somewhat difficult to make work, as evidenced by a mutiny in India in 1932 where HMS Warspite and HMS Ramillies do not leave their docks in Bombay as a result of Indian crewmen having major grievances with the British.
The rising belligerence of Germany and Italy and the growing power of the United States stretch Britain's capabilities, and Britain retires some of its most obsolescent vessels in the mid-1930s and focuses on better cruisers and destroyers, while the newest vessels - four G3 battlecruisers,
Hood, three N3s,
Royal Sovereign and
Revenge - form the core of Britain's Atlantic fleet. As a result of this,
Victorious moves its homeport to Vancouver, as the Royal Navy has the smallest influence in the Pacific.
The battlecruiser and indeed the growing Navy in general create many new jobs in Canada in and of themselves, and with America mired in problems and Canada having a growing sense of independence, it proves to be useful to King's attempts to establish Canada as a nation separate from Britain. Richard Bennett only gets a minority government, which lasts a little more than two years before King returns to power in early 1933. King's work over the 1930s results in Canada pulling out of the depression strongly. Hitler's rise and his subsequent actions convince King that the German leader was a potential threat to the world. World War II breaks out as in OTL, which causes
Victorious to be sent back to the Atlantic.
Hood's loss in May 1941 in battle with the Bismarck infuriates many, and
Victorious joins the hunt for Bismarck, as does a large portion of the Royal Canadian Navy.
Victorious joines
Rodney (a N3 ITTL) and
King George V (bigger ITTL, with the same 16" triple turrets as the G3s) in finding Bismarck, and all three BBs blast away at the German vessel, which ultimately sinks, but not after nearly a thousand 16" and 18" shots were fired at Bismarck. It is determined that 16" shots disabled the front two turrets, and as King George V was firing at the side and mostly hitting the back, the Admiralty figured that
Victorious had shut down half of Bismarck's main battery. The help of heavy cruisers
Norfolk and
Dorsetshire, as well as Canadian cruiser
British Columbia, also helped finish off the Bismarck. The Bismarck sunk and with the US now escorting convoys,
Victorious returns to the Pacific.
Victorious is on its way to Pearl Harbor when the Japanese attack it, and
Victorious finds USS Enterprise and her group. The United States declares war against Japan, which also sees Canada do so as well. The air attack on Force Z three days after Pearl Harbor succeeds in killing HMS Repulse, which has a British CO but a mostly-Indian crew, and severely damages the Prince of Wales, which makes it to safety. Victorious goes south to reinforce the Allied presence in the West Indies, but they don't get there in time to save to the ABDA fleet under Admiral Doornan, though HMAS Perth and USS Houston escape to Australia, though the former is destroyed alongside its berth in Darwin, Australia, in a March 1942 Japanese raid. Churchill's nightmare of having no allied capital ships in the Pacific is almost true - HMCS Victorious and HMAS Australia (Australia's G3) are the only ones left. But after the loss of Perth and the destruction of the ABDA command, the Australians are pissed off, and offer to back up the attack on Midway, though they weren't able to supply and get out there fast enough.
Victorious got its second battleship-on-battleship fight in November 1942, as Japanese battleships
Kirishima and
Hiei attacked and disabled American cruisers
San Francisco,
Helena and
Atlanta off Guadalcanal. American Admiral Halsey sent battleships
Washington and
South Dakota, along with
Australia and
Victorious, to destroy the Japanese ships. South Dakota took a massive beating against
Kirishima, but in the process,
Washington and
Australia opened up on her, while
Victorious spent its time blasting apart
Kirishima's escort force, with her and USS
Houston between them accounting for nine Japanese destroyers. Cruiser
Nagara attempted to tow
Kirishima out of danger, and was blown apart by
Victorious as a result, and
Kirishima capsized early in the morning on November 15. Victorious returned to Canada for a needed refit, which took several months but was done well.
The RCN expanded dramatically during the war. British offers to give the Canadians a second battleship were turned down early in the war, but with Germany's Navy a mess and after
Tirpitz' loss, Canada took a second BB, with HMS
Duke of York becoming HMCS
Adventure, while two light carriers,
Warrior and
Magnificent, were also sent to the RCN, and the Navy stacked up an additional set of cruisers, in addition to its huge fleet of destroyers, cruisers and frigates. Victorious again joined the Americans for the attack on Saipan, as part of America's mighty Fifth Fleet, participating in the "Great Marianas Turkey Shoot". After Refueling and re-arming, the ship was back in time for Leyte Gulf, and
Adventure and
Warrior were also on hand, as was HMAS
Australia.
Adventure and
Australia were part of the 7th Fleet's battle line, while
Shropshire,
Ontario,
British Columbia and
Jamaica were part of the Right Flank Cruiser set in the trap set up for Nishimura's Center Force. The trap worked perfectly, with the Japanese force blown to bits. But off of Samar, Japanese units caught the Americans by surprise, but despite this, the vessels of the 'Taffy 3', including the legendary destroyer HMCS Haida, stunned the Japanese, making Kurita think he'd run headlong into Halsey's fleet, and he chased off after a report of carriers to his north.
Haida itself sank a Japanese light cruiser in the mayhem, and got away with it.
By the end of the war, the RCN had two battleships, two light carriers, twelve light cruisers and nearly 120 destroyers, frigates and corvettes, and was the world's third largest Navy, behind only the RN and USN. The RCN's WWII actions earn it a lot of prestige and respect, and while the forces are drawn down after WWII, they are not totally dismantled as in OTL. Adventure returns to Britain in 1946, and
Victorious is decommissioned in 1947. After her wartime exploits, however, a public outcry saves her from the scrapper, and she is made into a museum ship in Halifax, Nova Scotia, opening to the public in 1949. Canada never has another another battleship, and only four of the cruisers are not decommissioned. A proposal to have
Victorious recommissioned for the Korean War in 1950 is vetoed on cost grounds, though the RCN sends six cruisers as the basis of its force, which prove to be helpful to the war.
Victorious underwent a major restoration in 1974-77, and to this day remains a prominent part of the Halifax waterfront. Adventure did not meet the same fate - she was decommissioned in 1951, and scrapped at Faslane in 1955. Only two British battleships -
Vanguard and
Rodney - were saved to become museums.