The WRE roster is a tragic reflection of a dying state. The legions of Caesar are gone, replaced by a mix of heavy defense and desperation.
There are two distinct "tech trees" in BI: the style (professional, armored) and the Barbarian style (numerous, hard-hitting, lightly armored). rome total war barbarian invasion units
A circular defensive formation utilized by spear-armed units. It leaves the unit completely stationary but makes them virtually immune to cavalry charges from any direction. The WRE roster is a tragic reflection of a dying state