It has become a cliché—though clearly valid—to say that we live in a world that changes daily. Today's strategic planners and national security experts face global scenarios that mutate constantly, posing often-unexpected challenges even as many military defense organizations around the world are reduced in size, capability, and reach. The United States faces broad and diverse maritime challenges around the globe, many best addressed by the sea services—the U.S. Navy, Marine Corps, and Coast Guard—working as a collective team.