Rep. Mike Gallagher (“The ‘Anti-Navy’ the U.S. Needs Against China,” op-ed, Oct. 26) is correct in advancing a mobile maritime, or porcupine, defense that, in the event of war with China, would prevent its military from breaking out beyond the first island chain running from the Sea of Japan to the Tonkin Gulf with a layered defense. The other part of this defense would be to deny Chinese access to all seaborne imports, as Japan was blockaded during World War II, and to take out all major Belt-and-Road projects with mobile forces, imposing huge economic costs and depriving China this...