<span>They depended on indigenous political and trading networks that brought slaves to the coasts.</span>
Answer:
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Explanation:
Manhattan Project
The United States first began developing nuclear weapons during World War II under the order of President Franklin Roosevelt in 1939, motivated by the fear that they were engaged in a race with Nazi Germany to develop such a weapon.
Nuclear weapons represent the ultimate defense of the nation, a deterrent against any and all potential adversaries. Combined with diplomacy and conventional military capabilities, nuclear weapons have helped to avoid a large-scale conflict between leading world powers for over fifty years.
Yes they have been successful
