What are the specific purposes of the declaration of independence, the preamble to the constitution, and the bill of rights?

The purpose of the Declaration of Independence is to declare freedom from British rule and that they were their own country.

The first purpose of the Preamble to the Constitution is to state explicitly in the first three words "We the People" that the constitution is the act for all people. The remainder of the preamble then discusses the objectives of the constitution and the government it establishes.

The main purpose of the Bill of Rights is to define the civil liberties of the American citizens.

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it was displayed because they had a love for war

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: