To continue this thread, I'm assuming some of the traits of the original post:
Assuming:
*USA
-Canada joined the American Revolution
-Through the 19th century, the US grows to cover all North America, Cuba, Guyana/French Guyana/Suriname, Dominican Republic, several Caribbean islands, and the Panama Canal zone.
-TR is not president, but someone moderately like him, but not a Progressive. I'm thinking possibly to avoid the Roosevelts altogether, along with Woodrow Wilson.
*Gran Colombia becomes a successful and stable republic modeled after the USA (politically speaking), and a first world nation by the 20th century.
*Brazil - smaller, relatively stable, maybe fractured.
*United Kingdom
-still holds all of Ireland
-Loyalists moved to Africa and Patagonia, sparking a series of South American wars that led to the annexation of OTL Chile, Argentina, Bolivia, Paraguay, and bits of Peru
-Africa colonized and industrialized more heavily
*Germany
-1812-1845 - Germans from across the HRE colonized Uruguay fighting on the British side, eventually forming a Prussian colony of Neu Preußen.
-1866 sowed seeds of AH collapse
-1870 absorbed Bohemia/Moravia from AH
-1871 - French/Prussian War won, though AH collapsed due to the casualties; Germany absorbs Austria and gets Mediterranean access, Hungary becomes its own Kingdom again. Italy gets Corsica, Nice, but not Savoy as the French promised. Germany holds OTL, Luxembourg, and Austria.
-Ferdinand III leads Germany firmly into the British camp, leading France to Russia; Wilhelm II (not a breech birth) is much like Ferdinand, and continues the policies, including more extensive German colonization/industrialization in Africa
*France
-to counter the UK/German partnership, seeks Russian, and eventually Ottoman alliance.
Q: What would be an appropriate trigger for WW1? We can't let Franz Ferdinand repeat OTL here; and would there be multiple possible causes for it?
Also, assume France performs a Schlieffen-like maneuver through Belgium during WW1, and in general, assumes the OTL Germany role, what would be an appropriate Allied response? Would France make some quick grabs into Germany, such as into Baden/Luxembourg and then entrench? What's a likely course for the war, also assuming the now Mega-US stays out for all but the last 2 years of the war? And assuming Greece had a better 19th century, and has some footholds on Asia Minor, how far into OTL Turkey can she get (at least Constantinople)?
I'm assuming the Allies here include the US, UK, Germany, Hungary, Greece, and Italy, while the Entente includes France, Portugal, Russia, Ottomans, Bulgaria, Spain.
Perhaps making a more fully fleshed out timeline from Zod's timeline might be in order.