“Over the last three or four years, there’s been a realization that the Navy is being stretched pretty thin,” says Bryan Clark, former special assistant to the chief of naval operations, the Navy’s highest ranking military officer. “It can all be taken back to this major root cause, which is supply not being able to keep up with demand,” adds Mr. Clark, who is now a senior fellow at the Center for Strategic and Budgetary Assessments (CSBA), a public policy research institute based in Washington, D.C.