A band of Viking raiders, hungry for plunder as always, has ventured all the way to southern Africa to cause trouble. It’s up to these valiant Zulu defenders to keep the northern marauders at bay!
(In real history, of course, what we know as the Zulu kingdom emerged in the 19th century AD, well after the end of the Viking age. However, Nguni-speaking peoples ancestral to the Zulu would have settled in what is now South Africa around the first century AD, so they would have been present in the region by the time the Vikings came around. And, you have to admit, “Vikings versus Zulu” makes for a cool title.)