same universe but 20 year after the first 3 book of the ixan prophecie serie
Fueled by the Soul. Commanded by the Dead. In an empire ruled by the honored dead, seraphs are the ultimate weapons. Fueled by the pilot’s very soul, these colossal humanoid mecha are unstoppable in battle. Jack Donolon is the most Read more

The first completely automated Bolo, designed to operate normally without a man on board, was the landmark XV Model M, which performed remarkably well.
However, the always-present possibility of capture and use of a Bolo by an enemy was a constant source of anxiety to military leaders and, in time, gave rise to the next and final major advance in Bolo technology: the self-directing and self-aware Mark XX Model B Bolo, Tremendous.
But what happens when a self-aware fighting machine decides to go rogue?
Bolos are self-aware tank created by Keith Laumer and featured in novels and short story collection by him and various other authors, rogue bolo is the third and only one available on kindle however if you want the complete collection check goodread here