small correction: the article I think you’re referencing in the title ( https://www.military.com/daily-news/2024/07/30/armys-troubled-11-million-marketing-deal-rock-and-ufl-seemingly-didnt-yield-single-recruit.html) says that it resulted in a projected loss of 38 enlistments, rather than resulted in 38 recruits de-listing.
The article is referring to GDP (PPP), so this has been true for a while now.
The Tricontinental has an in-depth discussion on the fall of US hegemony, if anyone’s interested in something to expand on this article. The bit about the Pentagon losing its own war games wrt Taiwan isn’t discussed there, though.