I would have to go with Completion of the transcontinental railroad in 1869
<span>Native Americans finally gained the right to vote in the United States through the "Indian Citizenship Act" issued in 1924, although it should be noted that some states refused to recognize this act. </span>
Well this was the beginning of women wanting equality, and also inspired the long process in history for African Americans to attempt freedom. It's eventually gained, but even as free people African Americans are not given the same rights as the old white guys who wanted "freedom" back in colonial days.
The correct answer to the following question will be:
Number 5