Longstanding notions about ratios of offensive versus defensive forces and about how much can be accomplished by a certain number of troops or platforms have had to be revised wholesale.

CENTERFORSECURITYPOLICY: Transforming the United States Global Defense Post

Strategic Command, Control and Communications (C3): The United States must ensure that the C3 systems that operate and integrate its strategic offensive and defensive forces effectively are given no less budgetary priority than is accorded those forces.

CENTERFORSECURITYPOLICY: Center for Security Policy | An Assessment Of Future Requirements For US Strategic Forces And Strategic Arms Control

States on strategic offensive and defensive forces.

CENTERFORSECURITYPOLICY: Center for Security Policy | What Can Possibly Come of a Moscow Summit Under These Circumstances? More Reckless U.S. Disarmament

Our current posture as John Hamre mentioned, still reflects in many ways the mentality and reality of the Cold War era, during which US forces deployed forward were defensive, tripwire units that were expected to fight near where they were based.

CENTERFORSECURITYPOLICY: Transforming the United States Global Defense Post

Continued development and deployment of strategic offensive and defensive weapons, particularly naval, ballistic, space and cyber forces.

FORBES: Futenma and Changing U.S., China, and Japan Strategic Visions in Northeast Asia

Later, US and Afghan forces said they had come under sporadic rocket and heavy machine-gun fire from insurgents dug into defensive positions in the area.

BBC: Afghanistan: Nato launches major anti-Taliban offensive