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I am well aware that this almost certainly requires a POD before 1900, however the question for a specific POD is only secondary here. The key issue that is necessary is that in a World War One (or WWI-equivalent conflict, more precisely, as it may have an altogether different trigger, but occurs around the same time), you have Britain and France fighting on different sides.
The by far most likely and easier option is Britain and Germany renewing/keeping their alliance instead of splitting up.

Anyways, the question I have now is: what would such a Great War look like in effect? Specifically I was wondering on how the massive colonial empires of Britain and France in Africa would be clashing with each other in Africa. This would vastly expand the African theatre of a Great War. How would the fighting look like, and what effects would this have on the fate and later development of Africa?
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