There’s an area of contract law that deals with voiding out contracts based on a mistake. Without going into too much detail, because I’m not trying to write a fucking hornbook on the subject, there are two types of mistakes: Unilateral Mistakes (one guy was a dumbass) and Mutual Mistakes (both guys were dumbasses). You can’t get a contract thrown out because you alone were a dumbass, you can get one thrown out because everybody was a dumbass.
This does not apply to the Pentagon, whose dumbassery is legendary and undeniable. The dumbassery of the Pentagon, it seems, is so enormous, so monumental, and so expected that it apparently is the legal duty of those under its command to expect them to fuck things up. Hence the reason that men and women who entered into contracts with it and gave due consideration in the form of years of their lives, their sanity, and their youth are being told those contracts are worth less than toilet paper.
Of course, the people telling them that are the same dipshits that spend thousands of dollars on a roll of Charmin, so at least there’s that.