For 10 points, Gandhi marched to the sea to protest a tax on what good?
This good has been exported from around Lake Katwe since the 13th century. This good was exported from a major production center at Taoudenni [tau-den-ee] by the azalai trade route. The horses of Alexander the Great's army legendarily found a source of this good at Khewra. A source of this good at Taghaza was the target of expeditions by Ahmad al-Mansur. Taxes on imports [emphasize] of this good provided most income of a state ruled from Koumbi Saleh. The (*) Great Hedge blocked the trade of this good, whose taxation prompted a protest that ended at Dandi - that protest was an example of satyagraha. The trade of this good flowed south [emphasize] across the Sahara desert in exchange for gold from West Africa. For 10 points, Gandhi marched to the sea to protest a tax on what good?
This good has been exported from around Lake Katwe since the 13th century.
salt