How did Hitler overthrow some European countries?
He used a tactic called a spear-head. It really looked like an
arrow. Tanks would go first with resuply trucks and halftracks
behind them. Every ten meters or so resuplly trucks would stop and
let men out.
Then he used a pincher movement. In this he encircled enemies
and slowly drained out their reinforcements or their morale.
All of this was combined with Blitzkreig or lightning
speed. He druged up the wermacht with anphetemines.