To purchase a house using the VA loan, both of you must be be eligable for the VA home loan guaruntee or you must be married. I am currently in that situation and am waiting for the VA to come through with the certificate.
1. To correct Corpaja the correct answer is maybe.
2. At least one "buyer" must meet the VA Loan Eligibility Requirements which can be found here.
IMPORTANT NOTE: If only one of the "buyers" meets the VA Loan Eligibility Requirements the "other co-signer" can take title with Veteran but no income from non-military co-signer can be used for qualification purposes unless you are married.
3. You can learn more about getting a VA Loan with USAA by clicking here.
I hope this helps you.