Book 7 of the Lost Regiment series stays true to form. The Bantag horde, led by Haark the Redeemer is closing in on Roum.
The transplanted Yankees, led by Civil War Colonel Andrew Keane have been on this alternative Earth for ten years. Under the very real threat of being killed and eaten by Merki warriors, the humans have advanced 50 to 75 years in military technology in only ten years and three wars.
They have tanks (land ironclads), hybrid blimp/airplanes, hand grenades, and hollow charge anti-tank rockets. Fortchen does a good job of showing the difficulties of using these new weapons effectively. He also spends a lot of time on logistics, weather, morale, etc.
My only complaint is that the book is too short at only 315 pages. I finished it in less than a day, and now I have to wait too long for the next installment.