the Mark IV was the first ever working tank to have an effect on combat. designed in WW1, it was made to cross trenches while protecting it's crew. this version is the "male" version with cannons in the sponson mounts, the "female" version had 2 machine guns in each sponson, 1 forward, and 1 backward. it's armor was very thin, a heavy machine gun or high-calibre sniper rifle was able to occasionally penetrate it, and it had no chance at all against the heavier cannons and howitzers.
this tank is gunless as-is but does have internal hovers already added to it. you can mount any weapon you want but i advice disintregrators for good firepower at all ranges and against any target.