What? Who, Me? Nah, I would never use a password like that, but I can see how adding 1 each time your password 'expires' might start to seem like a good option to people fed up by changing their password every 90 days. It's 1 step up from cycling through the minimum number of passwords necessary in order to get back to using your original one.
Thanks to InfoSec Taylor Swift for drawing my attention to an example of "Military Grade" being used by marketing in the wild (and for being coy about it who it was).
Frankly, if the military were all they're cracked up to be I'd kind of expect them to be using AES, but that bit strength (448 bit encryption) sounds more Blowfish, which wasn't even one of the AES contenders (Twofish was, though).