For the past decade, our military campaigns primarily have consisted of operations against violent extremist networks. But today, and into the foreseeable future, we must pay greater attention to challenges posed by state actors. They increasingly have the capability to contest regional freedom of movement and threaten our homeland. Of particular concern are the proliferation of ballistic missiles, precision strike technologies, unmanned systems, space and cyber capabilities, and weapons of mass destruction (WMD) – technologies designed to counter U.S. military advantages and curtail access to the global commons.