When Great Britain raised tariffs, this was unwise because "<span>Higher tariffs discouraged foreign trade" since all imported goods faced a tax before they could go to market.</span>
The pass at Thermopylae was thus opened to the Persian army, according to Herodotus, at the cost to the Persians of up to 20,000 fatalities.
Emperess Wu was a woman setting her apart from all of the other emperors.
Hope this helps. ฅ^•ﻌ•^ฅ