(worth repeating) Ukraine does not need a big mechanized military, but universal

(worth repeating)

Ukraine does not need a big mechanized military, but universal training on the swiss model; near universal small arms; to fill the armories with RPGs, and to focus on training soldiers with mobile artillery, including air defense, and to keep the army limited to very good special forces that rotate training of the civilians. If ukraine has this and six nuclear weapons they will be a free people. Russia is a one-city country. The centrality is its weakness. Nuclear arms guarantee Ukrainian sovereignty. special forces and a militia (which ukrainians are culturally disposed to anyway) will make occupation of the country literally impossible.

The central point being that large mechanized infantry is not necessary for the defense of ukraine. Large vehicles and concentrated forces are just targets.