Dark Forge — Miles Cameron

The next book in the Masters & Mages series that started with Cold Iron, from the master of fantasy Miles Cameron.
Only fools think war is simple or glorious.
On the magic-drenched battlefield, information is the lifeblood of victory, and Aranthur is about to discover that carrying messages, scouting the enemy, keeping his nerve, and passing on orders is more dangerous, and more essential, than an inexperienced soldier could imagine . . . especially when everything starts to go wrong.

Masters & MagesCold IronDark ForgeBright Steel
For more from Miles Cameron, check out:
The Traitor Son Cycle
The Red Knight
The Fell Sword
The Dread Wyrm
The Plague of Swords
The Fall of Dragons