Technically known as the HAVw A6 Juggernaut, it is a heavily armoured and armed ten wheeled tank manufactured by Kuat Drive Yards. The Grand Army of the Republic used them as military transports during the Clone Wars. They were still in service after the Galactic Republic turned into the Galactic Empire.
The A6 Juggernaut is my favourite ground-based vehicle from star wars. Looks better than most mega vehicles in the vast realms of star wars (no stats cause I am lazy).