Greeks always fought outnumbered?

[Ghostmojo]

According to modern historians as well as ancient ones, Greeks always fought outnumbered against barbarians, even when it makes little sense that the enemy be able to outnumber them.

One wonders how? And why didn't everyone just roll over and die upon seeing Greeks anyway?

One wonders (increasingly) what the point of your questions and observations is?

Consider the mighty and extremely formidable Roman war machine of later periods. They carved out a huge European empire and their reputation for success, bravery and capability went ahead of them - and yet there were still plenty of tribes who were willing to stand up and fight against them. Why didn't they all just roll over and die upon seeing the Romans anyway?