Final answer:
The U.S. Supreme Court's decision in Loving v. Virginia in 1967 overturned antimiscegenation laws, allowing interracial marriages nationwide.
Step-by-step explanation:
In 1967, the U.S. Supreme Court's decision in Loving v. Virginia overturned antimiscegenation laws nationally. This landmark case made it unconstitutional to prohibit interracial marriages, ensuring that all such bans could no longer stand. The case of Richard and Mildred Loving, who were arrested in Virginia for their interracial marriage, was central to this decision. The Supreme Court ruled unanimously that the Virginia Racial Integrity Act of 1924, which forbade interracial marriages in the state, violated the 14th Amendment. Consequently, all laws prohibiting interracial marriage were rendered null and void across the United States.