Described as book #0.5 of the Moties series, but is actually part of the interlinked Falkenberg series.
This book contains The Mercenary and West of Honor.
It appears to be the same book marketed as Falkenberg's Legion (in the US?) which along with Prince of Mercenaries, Go Tell the Spartans & Prince of Sparta makes up the total Falkenberg series collected together in one volume as The Prince.

Then there are the Moties books, basically: The Mote in God's Eye and The Moat Around Murcheson's Eye (or The Gripping Hand) and a few short stories?

And more CoDominium books: Birth of Fire, High Justice, & Exiles to Glory.

I had randomly chosen The Mercenary from my shelves and enjoyed it enough that I researched what else belonged to the series. Found I also had Future History on my shelves and have also really enjoyed the extra content in this book that follows on from The Mercenary.
Basically a prequel, narrated by one of Falkenberg's men - Hal Slater.
Millitary fiction that just happens to be set with galactic politics operatin g in the background. ( )