Just finished an epic WWI as Japan 1826-1894.
Allies: Japan/Aztec/Khmer, France/Netherlands, Arabia/Mali, Turkey, England/Inca, India
Axis: Germany/Portugal, Russia/Vikings, Spain
Neutral: America
68 years later: Japan controls the Iberian Peninsula(Lisbon, Madrid), Arabia controls Rome and southern Italy, Inca snatched up Spanish Uruguay, Netherlands control southern Baltic Sea (Copenhagen, Berlin), France takes the Alps (Frankfort, Venice) and Turkey controls the Danube (Budapest, Belgrade).
Vikings renounce Russian protection for Turkish, Portugal capitulates to Japan with east African possessions(Mombasa, Mozambique), India becomes Japanese vassal.
Egypt and Greece both spawn during the war. Greece immediately joins the fight as Turkish vassal and after the war ends, Egypt becomes Arabic vassal.
Got pretty hairy there a few times. When Russia/Viking joined in because of a Spanish DP I was caught unaware. Then the Apostolic Palace called a vote to end the Russian war (I said yes) and was called off when Greece spawned. Was able to buy peace after I razed Tallinn. And trading captured cities and having European territory threatened my stability, but I came through in one piece. At the same time, I was fighting Independents for land in China.