This thread is about number of engagements, not legacy, but Alexander did have a significant legacy (there were the Hellenistic empires, and the Hellenistic/Alexandrian language of rulership influenced the development of Roman emperorship, and Rome also repeatedly used Alexander as the yardstick for greatness when it came to war with the Persians). Han Xin and Khalid were excellent commanders (and I have often argued that Han Xin was excellent), but repeatedly asserting that they were obviously better than Alexander, Hannibal, etc, is probably going to provoke negative reactions to Han Xin and Khalid, not positive reactions. Han Xin and Khalid were great, but so were Alexander, Caesar, Hannibal, etc, and it is by no means clear who was the greatest, since they all operated in different historical circumstances, and there are many ways in which one can measure greatness (after all, you went with legacy). It's also not a scientific or mathematical question (this thread is about number of engagements, but this particular measurement isn't being used to determine who was the greatest general). Alexander - like Khalid and Han Xin - was indeed one of the greatest ancient commanders, and people on this forum are unlikely to take seriously any attempts to deny that.