Jack Johnson became the first Black heavyweight champion of the world in 1908 by defeating Tommy Burns in Australia. His victory triggered a national search for a "Great White Hope" — a white challenger who could reclaim the title and restore the racial order that Johnson's dominance disrupted. When Johnson defeated James Jeffries — the heavily promoted Great White Hope — in 1910, race riots erupted in cities across the United States, killing at least 23 Black Americans. Congress passed legislation banning the interstate transportation of fight films specifically to prevent Johnson's victories from being seen nationally.
In 1912, the federal government charged Johnson under the Mann Act — a law against transporting women across state lines for "immoral purposes" that was passed to combat prostitution. Johnson had traveled across state lines with his white wife, Lucille Cameron. He was convicted and sentenced to a year in prison. He fled to Europe, continued fighting internationally, eventually lost his title in 1915, and returned to the US to serve his sentence. He was posthumously pardoned by President Trump in 2018 — 105 years after his conviction. The pardon confirmed that the prosecution had been racially motivated.