The Starfire series

This military SF series (also known as “Star Fire”) is based on the universe of the Starfire series of board games. The first four novels were written by David Weber and Steve White, the fifth by White and Shirley Meier and the rest by White and Charles E. Gannon.

Here's a list of the novels, ordered by the internal chronology:
# Title AuthorsPubl.EnemyStartsNotes
1. Crusade Weber & White 1992 Thebans 227x? In TSAW I
2. In Death Ground Weber & White 1997 Bugs; ISW-4 (book 1 of 2) 2360 In TSAW I
3. The Shiva Option Weber & White 2002 Bugs; ISW-4 ( 2 of 2) 2364 In TSAW II
4. Insurrection Weber & White 1990 Terrans 2439 In TSAW II
5. Exodus White & Meier 2006 Arduans (ISW-5) book 1 2524
6. Extremis White & Gannon 2011 Arduans (ISW-5) book 2 25xx???
5. Imperative White & Gannon 2016 Arduans book 3 25xx???
5. Oblivion White & Gannon 2018 Arduans book 4 25xx???
The order of publication is the same, except that novel #4 was written first.

The first four novels are now sold as two omnibus volumes.

  1. The Stars at War consists of Crusade and In Death Ground.
  2. The Stars at War II consists of The Shiva Option and a revised and expanded edition of Insurrection.

Note that In Death Ground and The Shiva Option are a duology, despite the 5-year gap in publication and the split between the omnibus volumes. Insurrection is set a generation later.

Sources

Fandom.com has a Star Fire wiki, which (1) is not very good, (2) is more about the game than the books and (3) has very little about the later books.

The guy who created the Star Union of Crucis wrote this forum post from 2007 about events predating ISW-4.