The influence of radical reconstruction in the south erode because
of the interest of the norths in regards of the radical reconstruction in which
led it to dwindle due to the fact that they suddenly had lost interest in it
and other factors such as the white democratic power that has been emerged and
an erupted scandal in the administration.
This movement culminated with the 26th amendment.
The idea that 18 year old citizens could serve in the Vietnam War but not vote was seen as extremely unfair. After protests/marches regarding this topic, Congress approved the 26th amendment which gave all 18 year old American citizens the ability to vote. This amendment to the US Constitution was added in 1971.
The United States acquired Texas and the Mexican Cession, including California, and bought the southwestern territories of the Gadsden Purchase
