The answer to this question is railroads/steamboats depending on who you ask, I just need to hit the 20 words mark to help you.
B Maine was admitted as a free state and slavery was prohibited North of latitude 36°30
The war industries board affected the american economy by paying companies to produce millitary items like guns, cars Etc.
Answer:
"Innovations in machine guns, grenades, and artillery, along with essentially new weapons such as submarines, poison gas, warplanes and tanks in WWI. In WWII they made the the Bazooka, <u>ATOMIC BOMB</u>, M101 Howitzer, Radio Proximity Fuze, the Sherman tank, Poison gas, semiauto and automatic rifles, accurate bolt-action rifles, and the flame thrower. These all were either new, or more developed when war broke out. Also new were airplanes, that introduced the art of dog fighting and bombing enemies."
Explanation:
(Found this online.)
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a network of colonial commerce connecting three locations and spanning the Atlantic Ocean, involving the transit of enslaved Africans to the Americas, cotton and other raw materials from the Americas to Europe, and textiles and other manufactured commodities from Europe to West Africa.➴╚═══════════════╝➴
<em>Hope that helps</em>
