Motorised work well for smaller nations as they are easier and cheaper to produce and defend better than tanks National Focus and Political Power.

One, is this even a viable strategy? And two, should I play with Historical AI Focuses on so that I can rely on A: the Third Reich as an ally, and B: the US getting involved in an oversees war, with Japan or otherwise. Go down ‘Mobile Warfare’ land doctrine prioritising motorised bonuses instead of tanks (the left side of the research tree). I haven't played HoI4 a whole lot, so a few questions. Taking its northern territories will give me the resources I need to invade the US in full, establish a Reich-allied dictatorship in North America, and get my revenge for the War of 1812. However, despite its immense wealth in resources and infrastructure assets, the USA is heavily restrained by its laws and national spirits at the start of the game.

Alright, so from this (and a look at the achievements), I decided I'm gonna go Fascist Canada using the Mobile Warfare Doctrine (L/R), and build around Motorized / Mechanized Infantry, Armored Cars, and Light Tank variants (SPG/TD/AA), then declare war on the US once it sends its troops overseas. The United States is one of the largest and richest countries in the globe in 1936 and the only major power outside of Europe and Asia.

Hoi4 mobile warfare doctrine