Vikings were extinct by the time of Turkish Constantinople’s takeover.
The story is probably based on a Russian-Byzantine war. It has ended in 907 ad with Russian victory in Constantinople then capital of East Roman Empire but the war was actually about a trade dispute so the Russians didn’t occupy the city. There was a little pillage in suburbs after Roman army was crushed by the Russians but Byzantines agreed to remove tariffs on Russian trade and agreed to pay reparations. Then Kievan Prince Oleg symbolically nailed his shield to the city gates to show who is boss and the Russians went home.
Turks weren’t anywhere near at the time.
thanx Ragnar
You are a Sheldon of the humanities :-)