Flesh and Iron is the second novel in the Bastion Wars novel series by Henry Zou. It was first published in 2010.
On the planet of Solo-Baston, indigenous forces are rebelling against Imperial rule, led by the mysterious 'Dos Pares'. Colonel Fyodor Baeder and the 31st Riverine are sent to reclaim vital weaponry for the Imperium, but are decimated by native resistance. However they find there is much more to the rebellion, and that the forces of Chaos are at work...