This question stems from watching a lot of medieval films lately. Many of them portray the hero as being able to fight off large groups of bandits or soldiers in battle.. I know that it's a Hollywood theme and isn't very accurate, but how many people would a famous skilled warrior realistically be able to fight off simultaneously? Could be from any region.
Realistically, any claim to be able to take on several men at once is mere boasting. A warrior would have to have supernatural perception and reflexes to pull it off. However, historical figures certainly aren't above a good boast:
"I myself think that even if they were equal in numbers it would be hard for the Greeks to fight the Persians. What you are talking about is found among us alone, and even then it is not common but rare; there are some among my Persian spearmen who will gladly fight with three Greeks at once. You have no knowledge of this and are spouting nonsense."
-- Xerxes, to the Spartan king Demaratos, who claimed that the Spartans would fight the Persians no matter the odds (Herodotos 7.103.4-5)
Plato offers a somewhat more sober assessment of the abilities of even well-trained soldiers fighting untrained militia:
"Do you not think that one boxer perfectly trained in the art could easily fight two fat rich men who knew nothing of it?”
“Not at the same time perhaps,” said he.
“Not even,” said I, “if he were allowed to retreat and then turn and strike the one who came up first, and if he repeated the procedure many times under a burning and stifling sun? Would not such a fighter down even a number of such opponents?”
“Doubtless,” he said; “it wouldn't be surprising if he did.”
“Well, don't you think that the rich have more of the skill and practice of boxing than of the art of war?”
“I do,” he said.
"It will be easy, then, for our 'athletes of war' to fight with double and triple their number.”
-- Plato, Republic 422b-c