Yikes: What's an 'Act of War'?

This post is an excerpt from Pentagon Declares Cyberattack an Act of War.

Cyberattacks are part of the defense landscape and have been for a while. Among the more high-profile instances in the last year are the Stuxnet attack by the U.S. and Israel on Iranian nuclear facilities, the attacks by the Chinese government on Google and even a hack of a Pentagon project.

Now, the Wall Street Journal says a soon-to-be-released Pentagon policy document will announce officially that a cyberattack can be a jus ad bellum, or act of war.