Robert Myers spent 22 years in the US Army, serving in Germany, Vietnam, Saudi Arabia, and Kuwait and finally retiring with the rank of lieutenant colonel in 1988.
After retiring, began working at Casey's General as a manager. Within a few years he worked his way up to the top of the corporation, which owns hundreds of stores across America, many of which are situated in small towns with populations of 5,000 or less.
Source: Fortune, Casey's General Store