This is the grim state of our military’s readiness: An Air Force F-15C that broke in half during flight, two F-18s that have caught fire aboard ships, every single cruiser with cracks in its hull, A-10C Warthogs with fuselage cracks, the UH-1N Twin Huey helicopter fleet that is regularly grounded, and over half the navy’s deployed aircraft not ready for combat. That is the picture of the U.S. military in disrepair—what The Heritage Foundation’s Mackenzie Eaglen calls a “readiness crisis” among all U.S. military services, including the National Guard and reserves. Readiness is “dangerously lower,” she writes, leading to “delayed,...