I agree with all the nitpickers.

Legion style armies (based around sword and javelin armed medium/heavy inf) tended to replace phalanx style amies (spear and shjeildwall heavy inf, or dense pike inf/heavy cav) in the EB period just as cavalry dominated armies replaced Legion style armies in the dark ages.

This reflects social and political realities as well as their relative battlefield strength.

The phalanx tradition has two distinct phases, shieldwall (spear), and hammer+anvil (pike). Likewise legions eveolve dramatically, especially in their recruitment basis, so it is not historically valid or even coherent to say "legion>phalanx". Its like saying "hoof>paw", its a decontextualised juxtaposition ignoring the rest of the animal.

PS paw rulz.