Sudden Strike. The Chronicle of the Final Light, #2

Operation Noble Defense was supposed to establish the Kedraalian Republic as a new superpower in the galaxy. It failed. When the front line collapses, Private Avery Shetty finds himself isolated behind Oranian positions. Cut off, close to collapse, and low on supplies, he's just another forgotten member of the failed planetary defense force. Any hope of rescue starts with sneaking past the Oranian war machines hunting down survivors.
But the ground war isn't the only element of the conflict. If the combined fleet can't stand against the Oranians' unstoppable dreadnoughts, there will be no escape from the doomed planet. There's only one chance for Avery, and time is running out. Fans of tales of action, intrigue, and strife will love Sudden Strike, book two in The Chronicle of the Final Light series.