Maybe you've already heard about the Marine commandant's new planning guidance. Maybe you haven't. If you care about how strategy at the service level can work at its best, then you should take a close look. This episode digs into how tough questions from Congress, hard-hitting and public writing by servicemembers, and bold thinking by senior leaders all interacted to create an important document that will chart the way ahead for the Marine Corps.    The core of this episode is a conversation with Chris Brose, the former staff director of the Senate Armed Services Committee and the current head of strategy of Anduril Industries. Chris breaks down what's special about this document, what it gets right about the future of warfare and the rise of the defensive, and what the Army, Navy, and Air Force can learn from the Marine Corp's example. We also include a long segment from the last big speech by Gen. Robert Neller, the last commandant of the Marine Corps, which hinted where the service was going to go under Gen. David Berger, his successor. We also feature a clip from a recent episode of "Net Assessment," one of our other podcasts. And, finally, we close with some thoughts from Brose about life in the Senate, moving to the private sector, ethics and autonomy, and what Anduril -- a most interesting company -- is up to.