G. A. Henty 
One of the 28th 

A wonderful classic novel set during the events of Sunday 18th of June 1815 – the Battle of Waterloo.From the author’s preface:Although in the present story a boy plays the principal part, and encounters many adventures by land and sea, a woman is the real heroine, and the part she played demanded an amount of nerve and courage fully equal to that necessary for those who take part in active warfare. Boys are rather apt to think, mistakenly, that their sex has a monopoly of courage, but I believe that in moments of great peril women are to the full as brave and as collected as men. Indeed, my own somewhat extensive experience leads me to go even further, and to assert that among a civil population, untrained to arms, the average woman is cooler and more courageous than the average man. Women are nervous about little matters; they may be frightened at a mouse or at a spider; but in the presence of real danger, when shells are bursting in the streets, and rifle bullets flying thickly, I have seen them standing kitting at their doors and talking to their friends across the street when not a single man was to be seen.