Operation Winter Scar

"The conflict on Cressidium between the Leandric States Alliance and the Vestan Sovereignty has turned to open war, and the mechanized chassis pilots of the Union carrier Rio Grande have been tasked with aiding their allies in the LSA as the hardline Vestan government escalates the conflict even further.
Now, as part of Task Force Indigo, they face one of their most critical missions yet: inserting deep into Vestan territory, linking up with local resistance forces, and then tracking down the top secret Vestan superweapon codenamed TARTARUS. Success here could turn the tide of the war, but the Sovereignty won't give up without a fight."
-From the publisher description

User summary: The sequel to Operation Solstice Rain, for LL2