The Rugians were an eastern tribe who began moving south into the Silesian uplands in avoidance of burgeoning Balt expansion. They eventually settled on the edge of the Steppes, but were absorbed by the advancing Huns. Re-emerging from the retreating Huns some 50 or 60 years later, they found themselves in a position to settle Bohemia, recently vacated by the Marcomanni.

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