Nozomu Mochitsuki 
Tearmoon Empire (Manga) Volume 6 [EPUB ebook] 

Trouble is brewing on the outskirts of the Tearmoon Empire. A border dispute centered around an obscure stretch of woodland has been growing ever more contentious, and it’s only a matter of time before the imperial army and the tribe that lives in said forest end up in open warfare. How big of a problem could that really be? Big enough to spark the whole revolution, as it turns out!