What he is going to do with this 4-million strong army? Use them as cannon fodder against the invaders? It will be better to have a properly trained army of 400,000 than a four million strong rag-tag one.
Same thing he will do with the fake artillery, use it to intimidate and make it look like he has more than he really does. Posers.
http://i.imgur.com/vbJqbPt.jpg