Blonds in bondage

Maghrebi pirates held Gibraltar's strait
exacting tribute on those narrowed seas.
Norse traders, when obliged to innovate
linked stream to stream, portaging down through Kyiv.
To Mikkelburgh, a wonder to behold!
Before the world had heard of "Romanovs"
Where smelly wares were parlayed to bright gold
some days it's tusks and pelts, some days it's Slavs.
Until they're baptized, everyone's fair game;
"sold down the river" wasn't metaphor.
'Til Voldemar signed up--at least in name--
to live near rivers was to suffer war.
'Til Africa was featured in the Trade
the working class was signed up, raid by raid.