alternatehistory.com

This is a slightly lazy AHC but hope you'll bear with me.
The challenge is to have massive, industrialized warfare in the 1880s, 1900s, 1920s, and 1940s (or roughly in that timeframe) that involves significant power shifts and border changes. The POD is wherever around the 19th century it seems most fit. Each period of war must last at least 3 years but no more than 10. There must be a period of lull/peace between the wars, though there may be proxy wars. After the fourth World War, a final and indisputable world order must be put in place by a (new) set of global powers, whose control of weaponised technology makes another global war essentially the end of humanity. (Similar to OTL's Cold War except multipolar)

Bonus if one of these world wars has a major theater of war in territorial North America. Super Bonus if Italy flips in all four of these world wars.
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