Authors:

Many battles have been fought and won by soldiers nourished on beer, and the King does not believe that coffee-drinking soldiers can be relied upon to endure hardships in case of another war.

"Alcohol in the Western World" by Bert L. Vallée, Scientific American, Volume 278, No. 6, pp. 80-85, ru.scribd.com. June 1998.
Many battles have been fought and won by soldiers nourished on beer, and the King does not believe that coffee-drinking soldiers can be relied upon to endure hardships in case of another war.