Our civilization could well die of indifference within it before succumbing to external attack.
But all such plans were drawn up to counter the threat of external attack, rather than to protect against terrorism from within.
The move was intended to secure the city's outer perimeters from external attack.
If Amazon had a lot of single points of failure to external attacks, that theory might make sense.
Reliability also includes security, and the operating system should be able to resist external attacks.
The access door to the Bunker is hardened against external attack.
Failure to deal with external attack was one, strife within the royal family another.
There is no indication of external attack or forced entry.
Our common security is no longer limited to military protection against external attack.
The policy was focused on the defence of continental Australia against external attack.