The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.
I think you can find it here http://www.encyclopedia.com/people/history/us-history-biographies/alexander-hamilton
A permanent army of soldiers that are paid
I believe it is Switzerland I am not to sure so you might want to check.
