Rifleman Harris was a soldier in the elite 95th Rifles, one of Britains most prestigous infantry units during the Napoleonic wars. In this memoir, Harris relates his experiences in Denmark, the Peninsular, and at Walcheren. 
This is no history of grand plans and movements controlled by the lofty generals. Rather this relates the tale of a front line soldier who's concerns run much more with keeping shoes on his feet, a shirt on his back and, most, importantly food in his belly. 
Among other details, this book relates the horrors of the retreat to Corruna and the even more disasterous Walcheren expedition where an entire army was struck down by pestilence.