Douglas Haig re-introduced the term for his units of the British Expeditionary Force. This army was soon decimated at the Somme, and the term became something of a joke.
... town the population is spread out with 29.3% under the age of 18, 9.6% from 18 to 24, 30.3% from 25 to 44, 20.9% from 45 to 64, and 9.8% who are 65 years of age or older. ...