Great War - - Greatest Britain

In 1903, the Japanese Imperial State starts a military skirmish at the New Hokkaido (California) -Arizona Border. Other small skirmishes occur up and down the border until JIS starts a major advance though Texas and New Mexico. This is the start of the Great War between the British Empire (OTL plus the USA minus Washington, Oregon and California) and its allies (France, Portugal and the Philippines) and the Imperial Japanese State (Japan, Korea, East China, Siberia, the rest of the US and Indochina) with its allies: Spain, Germany and Mexico). After three hard-fought years, the British Empire takes much of Japanese America and Europe. On August 1, 1916, the Treaty of Manchester is signed, which gives Britain all of the JIS except for the Japanese Islands. Between the Great War and the Second, Britain grants independence to Canada and the Northern USA to form the Union of American Republics. Independence is also given to Britain's African possessions (the entire continent with the exception of South and West Africa, which becomes Portuguese) to become the First African Confederation.