Four (or all) wheel drive

[futon]

This was an interesting site about the history of four wheel drive vehicles, which was invented by the auto company 4WD.

https://usautoindustryworldwartwo.com/fwd.htm

All wheel drive became a fairly common feature for US military trucks by the time WW2 got started. 

Were there any notable vehicles that were all wheel drive elsewhere years before WW2 started?

[Argus]

Oh where to start... the Austro Daimler Armoured Car of 1905 was 4WD, Porsche did a few all wheel drive and articulated rigs prior to WWI too. 

As for between the wars, Straussler's stuff that lead towards the Daimler Dingo and Armoured Car was pretty notable for being much closer to modern 'All wheel drive' than mere 4WD. Conventional 4WD was available to more or less everyone by WW2, with economics usually making or breaking its actual provision.