Superdreadnought.

This is coolbert:

Absolute pie-in-the-sky outrageous weaponry WW1 era "not built" and we can all be glad for it. This you gotta see to believe.

"USA WW1 USA (1916) Land Battleship – Not Built"

"concentrate within one volume the striking power of an army”. - - Shuman. 

As to the weaponry of the superdreadnought land-ship consider:

"a long row of heavy chains suspending 'weights aggregating many tons' (he [Shuman] also describes them as weighing ‘several’ tons each) dangling down, crushing or smashing anything running underneath too."

A BRITISH ROYAL NAVY [RN] SHIP-OF-THE-LINE DURING THE NAPOLEONIC ERA INDEED DID HAVE THE STRIKING POWER OF AN ARMY. THAT COMBINED WEIGHT  OF LEAD AS PLACED INTO THE AIR BY EACH CANNON ON THE HMS VICTORY FIRING ONE ROUND EQUAL TO AN ARMY OF THIRTY-THOUSAND MEN EACH DISCHARGING THEIR BROWN BESS MUZZLE LOADER ONE TIME.    

coolbert.