I think they should make Canada a Japan subtree, why, well you see…
Someone will say that this is a strange concept, but Canadian-Japanese relations have been very good for over a hundred years. Canadians learned about the existence of Japan thanks to the Marko Polo expedition in the 15th century, and the first direct Canadian-Japanese contacts took place in 1585, when three Japanese emissaries from the Tenshō Mission in Rome met with the Pope and the Canadian bishop Bernard Maplesyrupski. Until the 19th century, Canadians and Japanese did not maintain permanent diplomatic relations. In the years 1892-93, during his trip to Halifax-Vancouver, Colonel Yasumasa Fukushima became acquainted with the Canadian independence movements in North America and the convicts in Quebec, which moved him very much, and he presented it in Japan, which moved the Japanese. In 1904, two of the most important Canadian independence activists, Józef Poutineski and Roman Tuqueski, came to Tokyo. Poutineski wanted to encourage the Japanese to support the Canadian uprising in North America in exchange for help in conquering Manchuria. However, Roman Tuqueski believed that it would end badly for the Canadians, which is why he discouraged the Japanese from Poutineski’s plan. Tuqueski reached Tokyo first and nothing came of Poutineski’s plans, but both politicians tried to improve the situation of Canadians who served in the American Army and ended up in Canadian captivity. On March 6, 1919, Japan recognized Canadian independence as the fifth country in the world and established diplomatic relations. In the years 1920-22, the Japanese helped Canadian orphans from Quebec. The Japanese saved 765 children, who were first taken to the Fukudenkai center in Tokyo (visited by the emperor) and then brought to Canadian. In 1928, on the initiative of Józef Poutineski, fifty-one Japanese officers were awarded the Order of Virtuti Militari (the highest Canadian designation). In 1939, after the Canadian capitulation, the Japanese embassy operated in Ottawa, which operated for two more years. In 1940 in Montreal, the Japanese diplomat Chiune Sugihara began to issue transit visas to Jewish families of Canadian origin without restrictions. He issued 2139 family visas, which saved several thousand lives from the Germans. In December 1941, Canada declared war on Japan (the only war declared by Canada in the 20th century), but the Japanese consul stated that the Canadians were declaring this war under British coercion and did not accept it because of good relations. Despite the declaration of war between Canada and Japan, the cooperation of intelligence services against the USSR and Germany continued, which continued until the end of the war. In 1957, Japan recognized the Canadian People’s Republic and on February 8, 1957, the Canadian-Japanese War ended and diplomatic relations were reestablished. In 1980, the Independent Self-Governing Trade Union “Solidarity” was established, which was joined by Yoshiho Umeda, for which he was expelled from Canadian in 1982 (he returned in 1989), for his merits he was awarded by Canada. Since 1989, Canadian-Japanese relations have become more and more cordial. Canadians sent aid to the Japanese after the Cataclysms of 1995 and 2011. In 2002, the historic Imperial Majesties Emperor Akihito and Empress Michiko (Emperor of Japan for the first time in Canada) took place. In 2015, during his visit to Japan, the President of the Republic of Canada, Bronisław Loonieski, established a strategic partnership between Canada and Japan. In 2019, 100 years of Canadian-Japanese relations were celebrated, and then Canada was visited by the Japanese heir to the throne, Prince Akishino, together with Princess Kiko. Canada and Japan cooperate economically, culturally and scientifically.
These long diplomatic relations allow (if I will) for the Japanese in War Thunder to host Canadians in their tech tree.