He is known as the first emperor of the tumultuous Year of the Five Emperors.

Chaos ensued in the Year of the Four Emperors.

He was the first emperor of the Year of the Four Emperors.

The Flavian dynasty rose to power during the civil war of 69, known as the Year of the Four Emperors.

Commodus' assassination would plunge the Empire into a civil war, known as the Year of the Five Emperors.

In Germany, 1888 is known as the Year of the Three Emperors.

Unfortunately, a substantial part of the work has been lost, with only the first five books covering the Year of the Four Emperors remaining.

At this juncture, the Roman empire was convulsed by its first major civil war, the Year of the Four Emperors, for a century.

The following year is known as the Year of the Five Emperors.

The year 69 was known as the Year of the Four Emperors.