A cardigan is a type of knit shirt than has an open front. Often, cardigans can be tied, buttoned, orzipped. By contrast, a pullover does not open in front but must be "pulled over" the head to be worn. It may be machine- or hand-knitted. The cardigan was named after James Brudenell, 7th Earl of Cardigan, a British Army Major General who led the Charge of the Light Brigade at the Battle of Balaclava during the Crimean War. It is modelled after the knitted wool waistcoat that British officers supposedly wore during the war. The legend of the event and the fame that Brudenell achieved after the war led to the rise of the garment's popularity.   The term originally referred only to a knitted sleeveless vest, but expanded to other types of garment over time. Cardigans were adopted by male fishermen to keep warm, but spread to academic circles, and are now popular with women as well. Plain cardigans are often worn over shirts and inside suit jackets as a less formal version of the waistcoat or vest that restrains the necktie when the jacket has been removed. Its versatility means it can be worn in casual or formal settings and in any season, but it is most popular during cool weather.