FillyofDelphi
Banned
Or, of course, invent the tank. Which is then countered by anti-tank rifles, heavy machine guns and light cannon (M1916 or Becker types).
This. Its important to remember, like Gas or the old cavalry charge dealing with WW I level tanks wasent too hard with the proper prep and responce (though devastating if you got caught with your pants down). If they exist in large numbers prewar, expect both sides to have counter measures to neutralize these large, cumbersome, highly flammable targets