G. A. Henty 
The Young Buglers 

Historical novel, set in Spain during the Peninsular War (Britain vs. the armies of Napoleon). The Preface begins: ‚…as a boy, I regarded any attempt to mix instruction with amusement as being as objectionable a practice as the administration of powder in jam; but I think that this feeling arose from the fact that in those days books contained a very small share of amusement and a very large share of instruction. I have endeavored to avoid this, and I hope that the accounts of battles and sieges, illustrated as they are by maps, will be found as interesting as the lighter parts of the story. As in my tale, ‚_The Young Franc-Tireurs_, ‚ I gave the outline of the Franco-German war, so I have now endeavored to give the salient features of the great Peninsular struggle. The military facts… are all strictly accurate, and any one who has read with care the story of ‚The Young Buglers‘ could pass an examination as to the leading events of the Peninsula War.‘ According to Wikipedia: ‚George Alfred Henty (8 December 1832 – 16 November 1902), referred to as G. A. Henty, was a prolific English novelist, special correspondent, and Imperialist born in Trumpington, Cambridgeshire, England. He is best known for his historical adventure stories that were popular in the late 19th century. His works include Out on the Pampas (1871), The Young Buglers (1880), With Clive in India (1884) and Wulf the Saxon (1895).‘