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In page History of Gibraltar:

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Following a raid in 710, a predominately Berber army under the command of Tariq ibn Ziyad crossed from North Africa in April 711 and landed somewhere in the vicinity of Gibraltar (though most likely not in the bay or at the Rock itself).[1][2] Although Tariq's expedition was an outstanding success and led to the Islamic conquest of most of the Iberian peninsula, he ended his career in disgrace after falling out with the Arab general Musa bin Nusayr.[3] His conquest nonetheless left a long-lasting legacy for Gibraltar: Mons Calpe was renamed Jebel Tariq, the Mount of Tariq, subsequently corrupted into Gibraltar.[4]