 In Indiana, the Klan generally did not practice overt violence but used intimidation in certain cases, whereas nationally the organization practiced political acts against minority ethnic and religious groups.The Indiana Klan rose to prominence beginning in the early 1920s after World War I, when white Protestants felt threatened by social and political issues, including changes caused by decades of heavy immigration from southern and eastern Europe.By 1922 the state had the largest organization nationally, and its membership continued to increase dramatically under the leadership of D.C. Stephenson.