The actual issue was being easily invaded by land. The rest of the world’s superpowers would need to invade us by sea, and even in the 21st century, keeping supply and logistics chains open across the ocean is actually pretty hard in a war with a peer who has more capacity to STOP your naval and airlift capability than you have of defending it.
The actual issue was being easily invaded by land. The rest of the world’s superpowers would need to invade us by sea, and even in the 21st century, keeping supply and logistics chains open across the ocean is actually pretty hard in a war with a peer who has more capacity to STOP your naval and airlift capability than you have of defending it.