The Great Depression began in 1929, and was complicated by a drought in the state. He instituted some relief measures, but largely did nothing significant believing that the Depression would soon end. In 1932 he called a special session of the General Assembly to lower taxes. Among the relief legislation passed by the General Assembly was Indiana's first old-age pension act, but Leslie vetoed it. As the Depression continued, Leslie decided more needed to be done. He began hiring unemployed workers to work on state road projects. He also advocated that his program be duplicated by the federal government, and his plan was soon implemented as the WPA. Among Leslie's other projects was continuing to grow the state park system.