Infantry in BI

[Kraxis]

Not to say that the swords and axes attack with full speed (1) while the spears only attack at (0.73). Meaning the swords and axes land more than a third more attacks than an equal number of spears. Or said differently, the spears are 27% slower.

But it is the stronger morale that makes the difference. The bigger unit will suffer losses faster and suffer moralepenalties faster than the smaller unit in this case. Thus you can always expect the swords and axes to last a whole lot longer.