A man does not equal a knight. A knight will fight to the death, the unsullied are like knights in that manner, they will fight until it's physically impossible for them to do so. The extra 90k men of the Queen's force are not knights or unsullied. If they get an arm cut off they're going to start crying and then die. I wouldn't straight away assume it was a simple result. Not to mention her dragons setting fire to hundreds of them at a time. Majority of the Westerosi men would see themselves facing a Dragon, something they thought was long gone from the world and **** their pants.