God help you if it's one of the Great War
As for weirdness, what about this...
British loyalists booted out of America after the Revolution and their Hessian mercenary pals move to South Africa - which Britannia wins from the Dutch in a war between them just before the American Revolution & renames the Crown Colony of Drakia (after Sir Francis Drake) - and set up a new nation whose quasi-Graeco-Romano-Fascisto-Tyrano overlords, reinforced over the course of the late 18th and 19th century by Icelanders fleeing their island after a volcanic devastation, French royalists tossed out after their revolution, 150,000 defeated Confederates, and other fun-wow human odds & ends, end up conquering the entire continent via the use of Jannisary-type slave armies composed of native Africans. It's now 1942, and the fictitious nation, called the Domination of the Draka
is about to attack nazi Germany and Soviet Russia simultaneously... ..and did I mention that the super-duper brain trust cooked up by mixing the finest specimins humanity had to offer has advanced their tech-level to the point that they have what amounts to modern-day weapons about equal to the tech level of 1988, when the book was written...?