Commentary States possess grand strategies, that is, how they define their interests, the threats to those interests, and the means that they employ to advance their interests in the face of threats. Additionally, states make strategic choices to address the threats they face and to advance their interests in the ever-changing circumstances of international politics. Usually this is done by making modest changes such as a making a doctrinal change, establishing a new base or alliance relationship, building new weapons systems, or investing in new weapons technologies. However, at times states execute major grand strategic changes to address threats. They undertake such a dramatic change, typically because the threat they face has become greater, even an existential threat. In 1914, Britain made a major break with its grand strategic past when it decided to send its army and so made a continental commitment to support Belgium and France against the …