When the Empire started to use the new tank, well......... Lets just say that the republic did stand a little chanc of winning. So the republic went together and created a tank ow there own. But what they wanted was more like a amored personel vehicle. So they took the turret of a destroyed empire tank and placed it on a large APC they just created. And then was the very first APT, Armored Personel Transport Tank born.But that wasnt all, no far from it. After moths of use on the battlefield went the APTT trough an upgrade. They put on smaller cannons to give it an egde over the empires forces, and they put on a missile launcher to be used against bunkers and landing craft, and against star destroyers.
1 Well here you see the APTT.