This novel takes place January 19, 1777, in winter during the Revolutionary Era. I imagine it with old weapons like muskets, swords, and so on. Not like how we have today like AK47s and Pistols. I can imagine it as a slow battle because after you shoot, you have to reload, which takes time, which we prolong the battle.
The time period which is the revolutionary era, makes it harder for the army to get around. It also makes it harder to get food because of rations. If it was this time period, they could be driving around or get food sent in from around the world, but in that time period, they didn't ave that kind of technology, so they had to walk and make rations.