Answer:
There was no need for them
Explanation:
In the 1700's, the plantations were largely self-sufficient, and the rivers of the south allow planters to ship their products directly from the plantation.
During the Cold War the United States and the Soviet Union engaged a competition to see who had the best technology in space. The Space Race was considered important because it showed the world which country had the best science, technology, and economic system.
Military: Germany was limited to a very small military (no more than 100,000 men of all ranks), and was not allowed to have any heavy artillery. This was to prevent Germany from gaining a military strong enough to launch another attack, but since a strong military was a very important part of remaining a world power, this meant Germany could never hope to achieve this whilst honoring the treaty.
Economic: Germany was forced to pay reparations (as they were being blamed for the war) to many countries, mainly Belgium and France. The amount was far to much for Germany to ever pay off, and was a key factor in Germany's economic crisis shortly thereafter.
Territorial: Germany was forced to give up all of it's colonies, which were given to various League of Nations powers. This was a major loss of land and population for the country, not to mention a loss of money from said colonies, again leading back to economics.
Answer:
They were banned.
Explanation:
United States passes legislation banning the slave trade.