Despite Herodotus's historical significance, little is known about his personal life. His Histories primarily deals with the lives of Croesus, Cyrus, Cambyses, Smerdis, Darius, and Xerxes and the battles of Marathon, Thermopylae, Artemisium, Salamis, Plataea, and Mycale; however, his many cultural, ethnographical, geographical, historiographical, and other digressions form a defining and essential part of the Histories and contain a wealth of information. Herodotus has been criticized for the fact that his book includes many obvious legends and fanciful accounts.