Walz and Vance's military histories will likely come up during the debate. Their similarities, though, don't stop at their willingness to serve. Both candidates enlisted as teenagers, used G.I. bills to attend college and neither saw combat.

Tonight's VP debate between Vance and Walz is expected to highlight and contrast their respective military service.

Walz retired from the Minnesota National Guard after 24 years of service in 2005, and was elected to Congress in 2006.