Herodotus, an ancient Greek historian, mentions Indian cotton in the 5th century BCE as "a wool exceeding in beauty and goodness that of sheep." When Alexander the Great invaded India, in 327 BCE, his troops started wearing cotton clothes that were more comfortable than their previous woolen ones. Strabo, another Greek historian, mentioned the vividness of Indian fabrics, and Arrian told of Indian–Arab trade of cotton fabrics in 130 CE.