Assuming purple is British Empire, no American Revolution? In fact, the French & Indian War must have gone better for the French, as Quebec seems to be French.. (Or maybe France got Quebec back).. Russia seems to have fused with the Ottoman Empire, except what would that make orange? Another fusion is Italy + Greece, which I dont know how that would come to be. Green is perhaps the HRE & colonies? which are pretty expansive, covering even Korea. Scandidnavia also has american terriroty somehow.. Norway/France War?
Another way might be to make green korean colonies, yellow Aztec Empire, purple Iroquois... though what POD would create that I dont know..