It may not be a huge surprise that USAA — a company that exclusively caters to military veterans and their families — was started by veterans.
Interestingly though, it doesn't have just one founder. It has 25.
Back in the 1920s, it was pretty hard for military service members to get (or keep) auto insurance, since it was either way too expensive or likely to get cancelled since they moved around so much.
So Maj. William Henry Garrison and 24 of his fellow Army officers got together in 1922 and formed their own mutual company to insure themselves, according to Encyclopedia.com. Today, the United Services Automobile Association provides insurance, banking, and investment services to nearly 12 million members.
Disclosure: I personally have USAA insurance and use its banking services.