A PHALANX is a wall of shields and long spears, the first true DEFENSIVE unit.
Twice the defence of Militia for little more cost.
Requires BRONZE WORKING. Needs COPPER: +50% shields without. Made obsolete by GUNPOWDER.
FORTIFY them in your cities and behind CITY WALLS, where their defence is multiplied.
They attack poorly; leave that to Legions and Chariots.