From BattleCorps, two Age of War tank designs are named in “Goliath Out of the Box” - the tracked ICE Capellan-made Suvorov, and the FWL-made Tigershrike hover tank. Both are contemporaries of the prototype Mackie, and would be in the Primitive category.
Likewise, “Break Away” mentions a Terran Hegemony VTOL of the Redhawk class.