[citation][nom]Filiprino[/nom]If that's the case maybe you should retire.[/citation]
You go back in time and tell the engineers of Mark IV and Medium Mark A Whippet landships that they should retire. Those tanks could do what the infantry couldn't, advance over one mile within six months without getting shot up, and scaring off enemy infantry.
Of course artillery was always an issue though. Though there was one exception for a Whippet during the Battle of Amiens, it advanced so far into the rear area that it busted up the artillery guns, which is a very serious loss in WWI.