Golly this one sure is hard. It eliminated the need for mail to be carried via roads or rail lines, and things (and people) could be carried directly to the destination's nearest airport instead of all the way down the winding roads to it.
Answer:
the Monro doctrine was a statement saying if you attack any of our neighbors and wish them harm we will defend them this was a statement used to say hey america over here we putting our foot down and saying no to colonialism this also kicked of the war of 1812
Answer:
Telegraph is what people used to coomunicate to people in the 19th century
Explanation:
Truman integrated the armed forces. He put black and white soldiers together in the Vietnam War
