Interracial marriage in the United States
Interracial marriage has been legal throughout the United States since at least the 1967 U.S. Supreme Court (Warren Court) decision Loving v. Virginia (1967) that held that anti-miscegenation laws were unconstitutional via the 14th Amendment adopted in 1868.
Source: Wikipedia — Interracial marriage in the United States (CC BY-SA 4.0)