I have enjoyed Wareham's naval books so I thought I'd give this one a shot. Its the story of a debauched worthless spendthrift son sent to the military by his father. The young man finds that he actually likes and is good at being a soldier, and finds success and stability in his new career.
The story covers several parts of the early Napoleonic (well, pre-Napoleonic) wars with the French and I can see where the story is going to go. The military tactics and culture is pretty well presented, warts and all, but some of it is exaggerated or questionable (the berserk post-siege rape and loot fest is presented as being ANY combat that faces opposition -- there were officers specifically that kept an eye on soldiers to restrain that unless they had faced a horrendous long siege).
My main problem with the story is again -- this keeps happening in these books, particularly from Wareham -- the insanely fast overpromotion. By the end of this book, he's a major in fewer than three years of service. This is just a poor approach because so many stories have been jumped past and it just is way too fast to make any sense at all.
Also, there are some flaws with characterization: our hero Septimus (kind of an odd name for England) starts out a complete wastrel, but the instant he puts on the Ensign uniform he becomes disciplined, focused, and professional. The transformation is somewhat plausible (he finally finds purpose and meaning for his life and grows up a little) but there's zero learning curve and Septimus never lapses at any point.
It would have been a better story to have him at most advance to Lieutenant and have several stumbles along the way (late to return to camp, sleeping with the wrong girl, etc).
The historically accurate characterization is great, Septimus is very callous and heartless, normal for his time period, toward the poor, non-British people, and women. There is a very odd pair of sequences in which Septimus is driven to brutal violence against an officer who rapes girls, but ignores an officer raping boys. The inconsistency seems driven not by a reasonable response of the time but a need to not criticize homosexuality.
Still, it was entertaining and moved along well; Wareham has a very effective narrative style. I wanted to read the next one but its not on Kindle Unlimited, and they want too much for the next book.