Then we went to war again on account of Megara , The famous Megarian decree which excluded Megara from the markets of Attica and the ports of the Athenian empire was passed in 432. It brought Peloponnesian discontent to a head, and the Archidamian War followed (431- 421 ). See Thuc. 1.139 . and allowed Attica to be laid waste; but the many privations which we suffered led us to make peace once more, this time through Nicias, the son of Niceratus. In 421 B.C. It was a Fifty Years’ Peace; but in 420 Athens allied herself with Argos , Elis , and Mantinea, who were aggressively anti-Spartan. By 418 she was at war again. As you are all aware, I imagine, this peace enabled us to deposit seven thousand talents of coined silver on the Acropolis