sentences:  The clearest proof of the new ruling relation of forces, from 1090, is the Crusade organised by the most important mercantile cities of the Christian states against the Islands.This effort was destined to finally eradicate Muslim piracy mainly based in Palma and surrounding havens.In 1115, Palma was sacked and later abandoned by an expedition commanded by Ramon Berenguer III the Great, count of Barcelona and Provence, which was composed of Catalans, Pisans and other Italians, and soldiers from Provence, Corsica, and Sardinia, in a struggle to end Almoravid control.