The Department of War just shot the accountants and opted for speed

The Department of Defense has never actually completed an audit anyways, despite it being a Congressional requirement. The last time they tried it everyone just agreed to stop after spending millions of dollars on an audit that revealed what everyone already knew.

There's not much reason to follow FAR when you don't have to account for cash flows in the first place

An audit is about the journey, not the destination. Auditing an organization spending almost $1T/year is going to be difficult no matter what, let alone dealing with all of the compartmentalization that exists there