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Spanish colonial forces had difficulty disarming the native people and this led to a less populated Texas and a 'buffer' type state. Fierce opposition from its native people scared many immigrants away, fighting was documented between Spain and the Comanche from 1519 to a peace accord finally in 1785. The term ‘buffer state’ was penned to explain the space and division in-between Colonial Spain (Mexico) and the French colonial Louisiana and the territory of ‘New France’.
There are many possible answers for this one! Only the national government can e.g. manage foreign relations, declare war or oversee trade between states and with other countries.
The act is called the Voting Rights Act of 1965.
This act, signed into law by Lyndon B. Johnson, helped to remove legal barriers that African-Americans faced when it came to voting. For example, African-Americans were unfair targets of things like literacy tests, poll taxes, and the grandfather clause. All three of these barriers were put in place to limit the amount of African-American citizens voting in local, state, and national elections.
This law ensured that African-Americans received the same protection guaranteed to them under the 15th amendment.