The Terrapin 8x8. Marine Personnel Carrier's Pappy..

Name a World War 2 vehicle that had the same specifications as the Marine Personnel Carrier that's wheeled.  You could name the DUKW but that would be a misnomer.  It wasn't designed transport men in the assault, it was and is a logistics vehicle.  The LVT? Nope, its tracked.

You would have to point to the Briish Terrapin8x8. It laid the groundwork for the modern amphibious 8x8 fighting vehicle.  Although it wasn't successful because of certain design decisions it did play a major role with the Canadians in the fighting in Northern Europe.

Read about the Terrapin here.