id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-7467		Battle of Artemisium - Wikipedia			.html	text/html	6312	553	76	The battle took place simultaneously with the land battle at Thermopylae, in August or September 480 BC, off the coast of Euboea and was fought between an alliance of Greek city-states, including Sparta, Athens, Corinth and others, and the Persian Empire of Xerxes I. The Persian Empire was still relatively young, and prone to revolts amongst its subject peoples.[3][4] Moreover, Darius was an usurper, and had spent considerable time extinguishing revolts against his rule.[3] The Ionian revolt threatened the integrity of his empire, and Darius thus vowed to punish those involved (especially those not already part of the empire).[5][6] Darius also saw the opportunity to expand his empire into the fractious world of Ancient Greece.[6] A preliminary expedition under Mardonius in 492 BC, to secure the land approaches to Greece, re-conquered Thrace, and forced Macedon to become a fully subordinate client kingdom part of Persia.[7][8][9] It had been made a vassal or ally as early as the late 6th century BC, but remained having autonomy.[9] Mardonius' campaign of 492 BC changed this.[9]	./cache/en-wikipedia-org-7467.html	./txt/en-wikipedia-org-7467.txt