"Flag in Exile" is the fifth book in a wonderful space opera series set some two thousand years in the future and featuring David Weber's best fictional heroine, "Honor Harrington."
These books are best read in sequence and I strongly recommend that you start with "
On Basilisk Station (Honorverse)" which is the first one.
The Honor Harrington stories are replete with parallels to the time of the French Revolutionary and Napoleonic wars. In particular, the Royal Manticoran Navy in which the heroine is a captain is clearly based on the Royal Navy at the time of Nelson. (In this book she finds herself seconded to serve as an admiral in the navy of Manticore's ally, Grayson.)
The technology of space travel and naval warfare in the Honor Harrington stories has been written so as to impose tactical and strategic constraints on space navy officers similar to those which the technology of fighting sail imposed on wet navy officers two hundred years ago. Similarly the galactic situation in the first thirteen novels contains many similarities to the strategic and political situation in European history in the late 18th and early 19th centuries.
This seems to be quite deliberate: many thinly veiled (and amusing) hints in the books indicate that they are to some extent a tribute to C.S. Forester, while the main heroine of the books, Honor Harrington, appears to owe more than just her initials to C.S. Forester's character "Horatio Hornblower" though the author has stated that she is also inspired by Nelson.
In the earlier book, "The Short Victorious War", Honor's home nation of Manticore, and their allies, were attacked by the People's Republic of Haven or "Peeps" - an agressive superpower which has been gradually conquering the small nations on its borders in bitesize chunks.
Following a coup in the People's Republic after their first round of attacks were not successful, Haven is now run by a "Committee of Public Safety" headed by one Rob S. Pierre, which has imposed a reign of terror. However, the new Peep government is just as committed to the war as the old one was.
Weber clearly means the reader to understand that Haven represents Revolutionary France. Early in this book, the Grayson High Admiral prsents a report to his head of state which concludes that "this is going to be a long, long war unless one side or the other completely screws up" and "this war isn't about territory any more. It's become a war for survival; someone - either the Kingdom of Manticore and its' allies, including us, or the People's Republic of Haven - is going down this time, Your Grace. For good."
At the start of this book, Honor Harrington has been relieved of command of HMS Nike and put on half-pay after the fighting two controversial duels. So she has returned to Grayson where she is now a "steadholder" e.g. one of the most powerful people on the planet.
Up to this point in the series, Weber has appeared to show disdain and even contempt for politicians, but now that his heroine has become one, she has to think through the decisions she takes from that very different perspective. From this book onwards in the series, the way that political needs affect military objectives begins to be considered in a far more realistic and less oversimplified way.
However, Grayson doesn't just need Honor as a political leader: they desperately need her naval experience, so they ask her to take command of a squadron of superdreadnaughts.
More traditionalist elements on Grayson are horrified at the idea of a female steadholder, so Honor has to deal with some very nasty tactics, including a horrible act of terorism. Honor has to defend against enemies both within and without.
There is an author's note in my copy (September 1995) explaining that the original manuscript was completed in October 1994. Between the time it was finished and the novel's publication came the Oklahoma bombing, an act Weber describes as "even more despicable than my fictional villains." He adds "That we cannot allow those actus to go unpunished or extend to those who commit them any shred of respect, whatever the "cause" which motivated them, is a lesson the civilised human community must teach itself."
At the time of writing there are sixteen full length novels and four short story collections in the "Honorverse" as the fictional galaxy in which these stories are set is sometimes known. The main series which tells the story of Honor Harrington herself currently runs to twelve novels; in order these are
On Basilisk Station
The Honor of the Queen
The Short Victorious War
Field of Dishonour
Flag in Exile
Honor among Enemies
In Enemy Hands
Echoes of Honor
Ashes of Victory
War of Honor
At All Costs
Mission of Honor
The five collections of short stories set in the same universe, not all of which feature Honor Harrington herself, are
More Than Honor
Worlds of Honor
Worlds of Honor III: Changer of Worlds
Worlds of Honor IV: The Service of the Sword
Worlds Of Honor V: In Fire Forged
There are four spin-off novels in two groups of two. "Crown of Slaves" (co-written with Eric Flint) and the sequel "Torch of Freedom" are stories of espionage and intrigue featuring a number of characters first introduced in earlier Honor Harrington novels or "Honorverse" short story collections.
"The Shadow of Saganami" is a kind of "next generation" novel featuring a number of younger officers in the navies of Manticore and her ally Grayson, set in an area called the Talbott Quadrant, and the sequel "Storm from the Shadows" describes the further events in that part of the galaxy.
For amusement, if you want to try to look for the parallels in the first thirteen books to nations and individuals from the French revolutionary period and the Hornblower books, one possible translation would be:
People's Republic of Haven = France
Star Kingdom of Manticore = Great Britain
Gryphon = Scotland
Grayson = Portugal
Prime Minister Alan Summervale = Pitt the Younger
Hamish Alexander, later Earl White Haven = Admiral Edward Pellew
Honor Harrington = Horatio Hornblower
Alistair McKeon = William Bush
Crown loyalists and Centrists = Tory supporters of Pitt
Conservative Association = isolationist/hardline High Tories
New Kiev Liberals = Whig Oligarchists
Progressives and traditional liberals = Whig radicals
Legislaturist former rulers of Haven = Bourbon monarchy and French nobles
Rob S. Pierre = Robespierre
Committee of Public Safety = Committee of Public Safety
Anderman Empire = Kingdom of Prussia
Silesia = Poland
Solarian republic = United States of America
Wall of Battle = Line of Battle
Ship of the Wall = Ship of the Line
Battleship = "4th rate" sailing warship (in each case too small to form part of the main force in a fleet action, but powerful enough to defeat anything else smaller than a ship of the line/wall.)
Battlecruiser = frigate (5th rate)
Cruisers and destroyers = 6th rate and smaller warships
Battle of Manticore = Battle of Trafalgar
After this battle the Napoleonic era parallels don't really apply.