What Deters and Why - Julian Thompson, Alyssa Demus, Michael J Mazarr, Arthur Chan, Alireza Nader, Stephanie Pezard, Elina Treyger, Bryan Frederick

The challenge of deterring territorial aggression is taking on renewed importance, yet discussion of it has lagged in U.S. military and strategy circles. The authors aim to provide a fresh look, with two primary purposes: to review established concepts about deterrence, and to provide a framework for evaluating the strength of deterrent relationships. They focus on a specific type of deterrence: extended deterrence of interstate aggression.