Maybe not imminent. But you do need to have it ready on the chance something happens. It’s pretty silly to completely dismantle a country’s military and only start spinning it up when you need it.

Militaries take a long time to build up, equip, and train. Not to mention keeping the institutional knowledge of folks with the expertise on how to operate, build, and maintain all the moving parts involved so that when the time comes, you’re not starting from square one. If you wait until you get attacked to get things rolling, you’ve pretty much already lost.