Can someone me compare and contrast the united states between 1776 and 1870?
i need a little just expanding my understanding on these questions:
how had the size of the united states changed?
how had the population make-up of the united states changed?
what new innovations changed life in the united states?
what key events changed the united states?
how was citizenship defined during each time period? how was enfranchisement (the right to vote) defined?

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.

because the vietnam war was fought in an especially brutal and untraditional way