The President announced his vision for the future of the U.S. military today. Kiss big counterinsurgencies goodbye. Get ready for more shadow wars, drone attacks and online combat, with the military’s eyes on the Pacific, rather than Afghanistan.

In a rare visit to the Pentagon, President Obama declared that the U.S. will be “strengthening our presence in the Asia-Pacific,” while “turning the page on a decade of war.” In practice, that means cutting the Army and Marine Corps and unspecified “outdated Cold War systems,” part of a broad effort to cut what the Pentagon now calculates as $487 billi...