Reduction of the Voting Age
"The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any state on account of age."
Twenty-six came about as a result of the foreign wars of the twentieth century. People could enlist in the military at eighteen, but could not vote until the age of twenty-one. Therefore, many soldiers died in combat before they were allowed to vote. This issue came to a head during the Vietnam war, and Congress eventually proposed the twenty-sixth amendment to lower the voting age.