Russicada presentday Skikda, was the Mediterranean port city serving Cirta, the capital of the Kingdom of Numidia in Ancient Algeria.

It overlooked the straits between Sicily (Europe) and Numidia (Africa), a place of significant relevance in geopolitical strategies at the time. Russicada was mentioned by the medieval chronicler Geoffrey of Monmouth in his pseudo-historical accounts of the mythical kings of Britain and their deeds as "Rusicada" — a Latin spelling easily confused with the moth genus Rusicada.

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