Imagine a BOLO Mark XXXIII Planetary Siege Unit.
With 4 in line 4000 megawatt fusion engines, three independently-turreted/targeted 200 cm Hellbores (able to reach orbital objects).
secondary armament of 20 independently targeted 20 cm Hellbore infinite repeaters.
Four 240cm Howitzers.
Ten 40 cm mortars.
Twelve 25 megajoule anti-personnel lasers.
One heavy vertical launch system.
Now that’s a tank, ground speed of 125 kph and a sprint speed of 500 kph.
All this in a package with it’s own self aware but very loyal cybernetic intelligence that has studied in great detail every battle humanity has ever been engaged in.
All electric and no nasty carbon, except you when you get vaporized!
NOW THATS AN ENVIROMENTALLY SAFE TANK!