M-45 Grinder

The M-45 Grinder also nicknamed the Landship was the Passivarian Republic's Main battle tank, it was designed on the 12/06/1910 (Pre-War) and then first built on the 05/06/1914 (Pre-War) during the Weaponry Revolution of 1910, it was designed to serve as a basic moving fortress as each side had mounted field guns, the front had a 30 caliber machine gun and the rear had an anti-armor mortar, its max speed was 5 miles per hour.
The Grinder has full covering tracks that connect to the roof of the tank and do a full rotation, a unique design for the time, the Grinder was the successor of the very old mobile armor design called the Living Tank.
The Grinder was first used during The First Great War on the battle of Movadam Hills to use as troop cover to advance up the hills and reach the top, which proved successful. later after The First Great War, the Quantonian Empire recovered the designs of the M-45 and gave them an upgrade, increasing armor strength, engine power, speed up to 15 miles per hour, Better armaments and implementing computers and other electronic devices in the tanks, the more upgraded version of the Grinder saw extensive use during The Second Great War most notably during the defense battle of Dustatia.
The M-45 Grinder during The First Great War was mostly a reserve vehicle due to being fairly outdated during the conflict as the Passivarian Republic had an up to date version called the M-52 Crusher. Then during the outbreak of the war, there was the last model to be developed by the Passivarian Republic which was the M-80 Macerator.
To this day the M-45 Grinder has been known as a vital war machine for both the Passivarian Republic and the Quantonian Empire for both winning wars. If you would consider surviving nuclear war a win that is.