The Defense Department spent nearly $1 billion on improper travel payments to military personnel and DoD civilians between 2016 and 2018, according to a report published this month by the Government Accountability Office. Over the course of three years, the Pentagon paid out $18.3 billion in reimbursements for official travel through the Defense Travel System. But of that, $965.5 million — more than 5 percent — were improper payments. An improper distribution means the amount distributed was either more than the correct payment, or should not have been processed. Read more on Military.com.