The German auxiliary cruiser Kormoran (HSK-8) was a Kriegsmarine merchant raider of World War II. Originally the merchant vessel Steiermark ("Styria"), the ship was acquired by the navy following the outbreak of war for conversion into a raider. Administered under the designation Schiff 41, 'Ship 41', to the Allied navies she was known as "Raider G". The largest merchant raider operated by Germany during World War II, Kormoran ("cormorant") was responsible for the destruction of 10 merchant vessels and the capture of an 11th during her year-long career in the Atlantic and Indian oceans.

An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in long distance and high value trade.