 There he was drafted into a military battalion in Indiana to fight in the American Civil War; he was discharged in 1862 due to injuries.Then he returned to Terre Haute and founded a clothing wholesaler there with his older brother Bernhard, who returned to Kuppenheim in 1873 for a visit.In 1865, Jonas left Bernhard to manage the Terre Haute operations and opened a new site Chicago, Illinois, where he eventually moved the corporate headquarters.