There seems to be an explanation of the meaning of the stars on Washington DC's flag.
There are three cities (city-states) across this planet that share striking similarities and play a crucial role in the global governmental system we have long been living under. The three city-states (along with the role they serve)is as follows: City of London (finance) Washington DC (military) Vatican City (religion)
The aforementioned city-states listed above are sovereign, corporate entities not connected to the nations they appear to be part of. In other words, the City of London (that is the square mile within Greater London) is not technically part of Greater London or England, just as Vatican City is not part of Rome or Italy. Likewise, Washington DC is not part of the United States that it controls. These sovereign, corporate entities have their own laws and their own identities. They also have their own flags. Seen below is the flag of Washington DC. Note the three stars, representing the trinity of these three city-states, also known as the Empire of the City. (There is also high esoteric significance to the number 3.)
Within the U.S., it is frequently displayed, not only on public buildings, but on private residences. What's really going on with it's meaning?