Sultan Ahmad al-Mansur of Morocco had pondered the matter for years. The salt mines of Taghaza, the gold of the Sudan, the weakness of Songhai under the successors of Askia Daoud: everything pointed in the same direction. What no Moroccan ruler before him had attempted, he would undertake.
In October 1590 he assembled his expedition at Marrakesh. Al-Sa’di ﵀ notes in the Tarikh al-Sudan the composition of that force with the precision of a man who had to count its consequences. Four thousand men. About two thousand archers and arquebusiers, fifteen hundred lancers, a thousand cameleers and servants. Eight cannon on camelback. Eight thousand camels for transport, ten thousand pack animals in all.
At its head stood Judar Pasha, a renegade of Spanish origin who had grown up in Moroccan service. His orders were simple and endless: cross the desert, take Gao and Timbuktu, bring back the gold.
The expedition moved south by way of Sijilmasa and descended into the Sahara. The route ran past the salt mines of Taghaza, then on to Arawan, and from there to the Niger. The distance was more than two thousand kilometers across terrain through which no army of this size had ever passed.
The toll was heavy. Mahmud Kati ﵀ writes in the continuation of the Tarikh al-Fattash that a great part of the force was lost on the way. Men dropped at the wells. Camels gave out under the load. The iron of the weapons grew so hot it could no longer be held.
When the expedition reached the Niger Bend in February 1591, about two thousand men remained. But they carried something no other army in the Sudan had ever carried: firearms, in number and in working order.