“blitzkrieg (Germ., lightning war). Penetration in depth by armoured columns, usually with preceding aerial bombardment to reduce enemy resistance; a technique perfected by Gen. Guderian in France in 1940. In Britain the term was abbreviated to ‘blitz’ and used to describe the massive air attacks on London and other cities between September 1940 and May 1941.”
Excerpted from: Cook, Chris. Dictionary of Historical Terms. New York: Gramercy, 1998.