The british gained control
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.
It depends on your definition. The US won every battle in Vietnam but
lost the war, but in other operations the US has taken a beating but
prevailed in the end. I hope this helps.
I think the answer is the 10th Amendment