Seriously? It was widely reported that he attempted exactly that during the Floyd protests in 2020 (first link I got, but Esper's testimony was reported everywhere, pick your preferred media, or just find and watch the committee hearing):

https://www.npr.org/2022/05/09/1097517470/trump-esper-book-d...

That time it failed because the pentagon leadership and generals stood in unison against it and he backed down. The guardrails have been rejiggered this time and it's only the courts that protect us now.