The African Americans helped out the war majorly throughout that time period. They participated in protest marches and also tried to join the forces with blacks to fight for freedom.
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Cartels, monopolies, trusts, and horizontal and vertical integration all share the goal of increasing profits. The step by the federal government to limit the power of corporations is the Sherman Antitrust Act. The argument that supports the perception of the big business leaders as "captains of industry" is that the support for technology benefits the economy.
Last one because everyone started building navies, so everyone else started building navies in order to defend against other navies.
