On August 15, the crisis of the battle of Britain was reached. All the resources of Fighter Command in the South were used. The most difficult and dangerous period of the Battle of Britain was between August 24 and September 6, when the German attack was directed against the R.A.F airfields in the South of England with considerable success. In this speech Churchill coined the phrase "The Few" to describe the R.A.F fighter-pilots. The phrase stuck. The final sentence of this speech, including the use of the word "benignant," is a good example of Churchill's choice of unexpected and assertive adjectives to make a phrase memorable.