Corinth was one of the major states in the Greek world. In 550 BC, Corinth joined the Peloponnesian League, and so was allied with Sparta during the Persian and Peloponnesian Wars (as documented by Herodotus and Thucydides). Corinthian pottery is distinct in its style, in much the same way Black-figure and red-figure wares are. Corinthian pottery was the largest group of exported wares from the 7th and 6th centuries, following the Geometric style. It continued to be made up until the 5th century, although Attic pottery had grown steadily in popularity by this point. By the 4th century Corinthian pottery had almost entirely ceased in production.