In the preamble, what is the meaning of the phrase to form a more perfect Union"?

"We the People", the first three words of the Preamble of the United States Constitution is used every day by the talking heads on TV and radio. ... "A more perfect union" implies that the progress of the American experience is never complete.

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.