Before the invasion of Japan some people claimed Kyushu was good “tank country”, where armor and trucks could rapidly move around to surround enemies and focus fire on them. In fact, some of them based timelines and casualty estimates on that assumption.

This is a portion, not unrepresentative, of one of the actual maps they had to use:

Complete map sheet is here.

We have to wonder, what else might have motivated such assertions from top U.S. Army commanders?