The Pentagon demanded the money back after audits revealed overpayments by the California Guard under pressure to fill ranks and hit enlistment goals.
Faced with a shortage of troops at the height of the two wars, California Guard officials offered bonuses of $15,000 or more for soldiers to reenlist.
Van Meter said he refinanced his home mortgage to repay $25,000 in reenlistment bonuses and $21,000 in student loan repayments that the military says was improperly given to him.
Retired Army major and Iraq veteran Robert D'Andrea said he was told to repay his $20,000 because auditors could not find a copy of the contract he says he signed.