Hello Marcel
A couple other points
Built a good communication system and buy enough radios
Built a good early-warning system. At that time this means trained observers, posts for them and good communications between posts and control centres. Enough exercises in peace time to clear the bugs and to keep the system in good working order.
Built many small, secret, well camouflaged dispersal airfields with good access to wire communications and train personnel to work from them.
Teach a good camouflage discipline to ground forces.
Built enough air raid shelters for civilian population.
Juha
A couple other points
Built a good communication system and buy enough radios
Built a good early-warning system. At that time this means trained observers, posts for them and good communications between posts and control centres. Enough exercises in peace time to clear the bugs and to keep the system in good working order.
Built many small, secret, well camouflaged dispersal airfields with good access to wire communications and train personnel to work from them.
Teach a good camouflage discipline to ground forces.
Built enough air raid shelters for civilian population.
Juha