Strategic defence
See also: Defence in depth
Strategic depth

Notes: 

Sources: Dupuy, Trevor N., Understanding War: Military History And The Theory Of Combat, Leo Cooper, New York, 1986
Thompson, Julian, Lifeblood of war: logistics in armed conflict, Brassey's Classics, London, 1991

Recommended reading: The Adelphi Papers, Volume 359, Number 1, August 1, 2003 Stephen J. Lukasik; S.E. Goodman; D.W. Longhurst,  Chapter 2: Strategic Defence Options, pp. 15–24(10)