Ghana's king held daily court to maintain order and monitor the kingdom's wealth. Wealthy displays of gold by the king, soldiers, and guard dogs showed visitors that Ghana was rich in gold. The king tightly controlled gold to maintain power. When the king died, his sister's son would inherit the throne, unlike in Europe. The king conscripted all men for battle to prepare for war without training time. Ghana taxed trans-Saharan traders who passed through, gaining wealth from its strategic location along trade routes. Salt mining at Taghaza drove the gold-salt trade, benefiting all involved through taxes funding army protection of traders.