Mildred Gillars, nicknamed Axis Sally, was convicted of treason for working with the Nazis as a broadcaster.

Mildred Elizabeth Gillars was an American broadcaster employed by Nazi Germany to disseminate Axis propaganda during World War II. Following her capture in post-war Berlin, Gillars became the first woman to be convicted of treason against the United States. In March 1949, she was sentenced to ten to thirty years' imprisonment. Gillars was paroled in 1961. Along with Rita Zucca she was nicknamed "Axis Sally".

Treason is the crime of attacking a state authority to which one owes allegiance. This typically includes acts such as participating in a war against one's native country, attempting to overthrow its government, spying on its military, its diplomats, its officials, or its secret services for a hostile foreign power, or attempting to kill its head of state. A person who commits treason is known in law as a traitor.