Communications and Transport.
Telegraph. The telegraph was invented by Samuel Morse in 1844, and telegraph wires soon sprang up all along the East Coast. ...
Aerial reconnaissance. ...
Railroads. ...
Army ambulance corps. ...
Weapons and Ships.
Long-Range Weapons and the Minie Bullet. ...
The Gatling Gun.
Answer:
Explanation:
It was built to help transport workers, equipment, goods to work sites and carried miles of spoil away from the construction sites.
Customs is an authority or agency in a country responsible for collecting tariffs and for controlling the flow of goods, including animals, transports, personal effects, and hazardous items, into and out of a country.