Why does lincoln make so many references on the american revolution

Lincoln probably made so many referances to the American Revolution because of the Civil War at the time considering that the South wanted some sort of independance from the North because they thought they needed slavery and the American Revolution was so that America could become independant and not be ruled by Britain anymore, so that is why he probably referred a lot to the American Revolution.

that would be the steamboat because none of the other things are forms of transportation

the roman empire began to fall