Every year, same time frame. Like clockwork, these training events stir up tons of hysteria because theyre so large and use freight trains to get all the equipment where it needs to go.

Start tracking, you'll see. Military very rarely changes mass training events like this no matter the branch.

Caveat: there are odd times, not every year, when the army and marines send a freight full of tanks and whatnot to repair/decommissioning depots.