How would a series of highways across the country help in its defense?

A series of highways across the country would help in its defense by facilitating the movement of military personnel, equipment, and supplies to strategic locations quickly and efficiently. This enhanced mobility would allow for rapid deployment in response to threats or emergencies, as well as the ability to easily transport reinforcements to areas in need of defense. In addition, the highways could also serve as evacuation routes in case of an attack, natural disaster, or other emergency situations. The connectivity provided by a national highway system would improve coordination and communication between military bases, command centers, and other critical defense infrastructure, ultimately strengthening the country's overall defense capabilities.