Original: In 1945, he was co-founder of the local Christian-Democratic Party in DÃ 1\/4 sseldorf, which became part of the CDU later in 1945. Also in 1945, the DÃ 1\/4 sseldorf chapter of the united workers union was founded, presided by Arnold.
Simplified: After the World War II Arnold founded the of DÃ 1\/4 sseldorf Christian democratic party in 1945.