The tone and vulgar word choices of the article undermine its credibility. I’m glad they did because it inspired me to google the issue. Second result debunks it:

https://www.metabunk.org/debunked-missing-21-trillion-6-5-tr...

Per the DOD comptroller, the unsupported journal adjustments are a technical accounting term

> when the military has to make quarterly or year-end financial statements, some entries, like the value of certain assets (like aircraft carriers) or liabilities (like pensions), have to be transferred either manually or by an automated but uncertified system. Because of this it's marked as "unsupported" because it lacks a rigorous audit trail. But it's not missing. It's just a long list of entries, like the value of the Navy's ships, that don't meet proper accounting standards