The Indiana Klan was a branch of the Ku Klux Klan, a secret society in the United States that organized in 1915 to affect public affairs on issues of Prohibition, education, political corruption, and morality. It was most strongly anti-Catholic, but also opposed Jews and blacks. It opposed immigration from southern and eastern Europe, which was sharply reduced by a new law in 1923. In Indiana, the Klan generally did not practice overt violence but used intimidation in certain cases.