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 providing efficient and quick transportation for military personnel, equipment, and supplies. This would allow for rapid deployment of troops and resources to different areas of the country in case of an emergency or threat. Additionally, highways would facilitate communication and coordination between different defense forces and agencies, enabling a more effective and coordinated response to any potential threats or attacks. Moreover, highways could be used for strategic purposes such as establishing checkpoints, monitoring and controlling traffic, and enforcing security measures to protect the country's borders and major cities. Overall, a well-developed highway system would enhance the country's defense capabilities and contribute to its overall national security.