Convoy

The US Army practices constantly.

Trucks can be unreliable and so they have to constantly test trucks and make improvement.

Still, wheeled vehicles are more reliable than tracked vehicles.

Powerful trucks are needed to tow the massive guns in use by the modern army.

Other large cannons can be mounted on trucks directly and eliminate the trailer.

Figures by HaT and vehicles are vintage dimestore soldiers trucks, possibly by Barclay.

Inter War US Army

In the mid to late 1930's the US Army developed many new vehicles that did not see series production.

They experimented with tanks and armored cars and artillery that were the fore runners of those used in World War Two.

The infantry did not look different from the Great War, but the M-1 rifle was adopted years before for WWII started but it took a long time before they were fielded in great numbers.

Electrical mechanical computers were used for fire direction. Trucks like this provided electrical generation that was highly mobile.

Many techniques were used to provide mobile artillery support, both wheeled and tracked.