First Ledo-Burma Road Convoy to China, U.S. Army Photo, 1945. Click photo for larger version.
During World War II the American Army became highly mechanized, more so than any armed force in history. Even the vaunted German Army, with their celebrated tactics of Blitzkrieg, never achieved the scope and degree of mechanization as the U.S. forces. The U.S. also supplied large numbers of vehicles to Allies. In many ways it was Detroit, representing the vast production capacity of the American economy, that enabled the Allies to win World War II.
For World War II vehicle photos, be sure to visit the Olive-Drab.com Military Vehicle Charts that start here. Hundreds of US military vehicles, soft-skin and armor, from WW II to present are listed, linked to individual pages with background information and photos. Many other pages about WW II military vehicles can be found by using the Olive-Drab.com Directory or via Search.
There are many fine websites that have additional information on this
topic, too many to list here and too many to keep up with as they come and go.
Use this Google web search form to get an up to date report of what's out there.
For good results, try entering this: wwii vehicles. Then click the Search button.
Vintage Military Trucks has an excellent set of photos of various restored vehicles, WW II and newer, mixed with images of jeep advertising and other goodies.