Imperium Series by Travis Starnes

An Uncertain Future in a New PastDuring the test flight of a prototype faster-than-light craft, Lt. Commander Ky is flung into an ancient past that never existed. Rome has fallen, defeated by the mighty Carthaginian Empire, its survivors chased off the continent and onto what had been the remote province of Britannia. Hounded by the Carthaginians bent on conquering the known world, Rome is on the verge of destruction... moreAn Uncertain Future in a New PastDuring the test flight of a prototype faster-than-light craft, Lt. Commander Ky is flung into an ancient past that never existed. Rome has fallen, defeated by the mighty Carthaginian Empire, its survivors chased off the continent and onto what had been the remote province of Britannia. Hounded by the Carthaginians bent on conquering the known world, Rome is on the verge of destruction. Stranded and alone, except for a tactical AI implanted in his head, Ky has lost everything and must find a way to live in a world different than anything he's ever known.For Ky to survive, he needs a new home. For the Romans to survive, they need a miracle. But can a man from the future work with people so far in his past, or is this match doomed to failure? less

Marching to WarThe Carthaginians are marching to destroy Rome and it is up to Ky, a test pilot from the future thrown into an alternate past, to keep the once mighty Roman Empire from being destroyed. As Ky gathers Roman forces to defend against the Carthaginian host, he must also struggle to contend with a malfunctioning AI implanted in his brain that is slowly gaining sentience. Thankfully, he is not alone... moreMarching to WarThe Carthaginians are marching to destroy Rome and it is up to Ky, a test pilot from the future thrown into an alternate past, to keep the once mighty Roman Empire from being destroyed. As Ky gathers Roman forces to defend against the Carthaginian host, he must also struggle to contend with a malfunctioning AI implanted in his brain that is slowly gaining sentience. Thankfully, he is not alone. With the help of the Emperors daughter Lucilla, he fights both his own mind and the Carthaginian hordes for a chance to build a new world. less