That's an excellent question - I'd speculate that they were perhaps mentioned in the passage beginning, ...Further, Haffner claims that other than Alexander

That's an excellent question - I'd speculate that they were perhaps mentioned in the passage beginning, ...Further, Haffner claims that other than Alexander the Great, Hitler had a more significant impact than any other comparable historical figure... However, I wasn't able to find out for sure with a quick browse through the page history.