BBC - Age of cyber warfare is 'dawning'

"many nations were now arming to defend themselves in a cyber war and readying forces to conduct their own attacks."

http://news.bbc.co.uk/2/hi/technology/8363175.stm

The original analysis of "netwar" (Arquilla and Ronfeldt at RAND) saw the threat from different angles:

Networks and Netwars
The Future of Terror, Crime, and Militancy

http://www.rand.org/pubs/monograph_reports/MR1382/

The Advent of Netwar Revisted
http://www.rand.org/pubs/monograph_reports/MR1382/MR1382.ch1.pdf

The Advent Of Netwar
http://www.rand.org/pubs/monograph_reports/MR789/