Dewey's Men are an army of identical models who all wear white clothes, they were created when Hal and Dewey made a model city what Hal described as a utopia.
Dewey's army has model tanks and model men.
The armys end 
Edit
Dewey's army ended when Lois tripped over a part of the city, causing her to fall over and destroy the city.
The last army member Edit
During Malcolm's play, it is shown that Dewey has one of his men in his pocket.
