A small "problem" with the subject of military vehicles

A small "problem" with the issue of military vehicles

Basically, I'm bothered by the fact that we're going from 3 cavalry units to only 2 vehicles (I know that artillery units are also vehicles, but that's not what I'm referring to)

I think that what would be missing would be cars, but they would certainly be very similar to armored vehicles and their evolutions

Another option is that we have motorcycles and they end up evolving into one of those modern war robots