Less well-known bombings, such as that of the Polish town of Wieluń within the first two hours of the war and prior to any attack on Germany, either by air or land, are left out. Friedrich mentions the British use of explosive weapons followed by incendiary, a mixture designed to create large fires. He also mentions that the technique to create firestorms was a German development first seen in the bombing against British cities, such as the Coventry Blitz (14 November 1940) and the Second Great Fire of London (29/30 December 1940).