What is the author's style in Sharpe's Battle: Richard Sharpe and the Battle of Fuentes de Onoro, May 1811 by Bernard Cornwell?

The language in Sharpe's Battle is informal with more narrative than dialogue although there is enough dialogue to lend authenticity to the characters and to break up the flow of the narrative. Some of the language borders on archaic since the novel is set in the early 1800's and the language reflects that setting just enough so that the characters seem authentic. There is a great deal of military terminology and battle scenes that might be mildly confusing to a reader who knows nothing about the military or the weaponry of that era. Not knowing the military terminology is not a hindrance to the comprehension of Sharpe's Battle, but the reader would probably enjoy the book more with some knowledge of it.