Athens became so attached to this source of easy money that dissent soon grew among the member cities , and Sparta led the confederacy from Athens after the Peloponnesian War ( 413 404 b.c. ) . The Persians , sensing weakness in the ranks , launched another offensive , resulting in the Ae ? Χean coast cities coming under Persian control in 387 b.c.
Athens was attached to the easy money because it helped them expand further .