While it’s a fascinating thought, the Romans and Vikings never actually engaged in direct conflict. The Roman Empire reached its peak around the 2nd century AD, while the Viking Age began several centuries later, around the late 8th century AD. By the time the Vikings started their raids across Europe, the Western Roman Empire had already fallen (in 476 AD).
The Romans had extensive interactions with various Germanic tribes, some of which are often associated with the early Vikings, but these were distinct groups and not the same as the Norse seafarers who would later become known as Vikings.
In summary, there were no battles or direct encounters between Romans and Vikings as they belonged to different eras in history. The two groups exist in separate timelines, making their direct conflict impossible.