Sixty five ships sunk or captured, 2,000 crewmen captured.
Not one death among them. Unusual for a pirate, don’t you think.
It was smart on Semmes' part, as the only reason the Alabama was able to mount operations was because of support from the UK. If he had been killing merchant sailors, the British would have withdrawn support a lot earlier. As it was, the US government sued the UK for damages and won a major award in international arbitration.