Keith Laumer 
Bolo [EPUB ebook] 
The Annals of the Dinochrome Brigade

Unrivaled in the history of artillery and unsurpassed in its ability to reason, Bolo replaced man in that most human of endeavors: war.In these scintillating tales of the ever-advancing Dinochrome Brigade, the most effective weapons ever devised ell their own story in action-packed chronicles of extra-terrestrial adventure. Bolo: fighting in proud combat as monster saviors of their human creators.