In 1506, another fleet under Afonso de Albuquerque started to raid the coasts of Arabia and the Horn of Africa, after defeating a Muslim fleet. In 1507, a fleet of about 20 Portuguese ships entered the Red Sea and raided Indian shipping there, bringing the Mamluk Indian trade to near collapse. The Portuguese attempted to establish a base at Socotra in 1507 in order to stop the Mamluk trade through the Red Sea, but the island proved too inhospitable and was ineffective in that role, so that the Portuguese left after a few months.