Ancient Greek Warfare The phalanx was a Greek battle formation using tight infantry ranks and long spears. True False None Spartan warriors were conscripted from the general population and trained only briefly before battle. True False None Greek city-states often hired mercenaries to fight their wars. True False None Greek warships, known as triremes, were slow but heavily armored vessels. True False None Athens had one of the most powerful navies in the ancient Greek world. True False None Time's up Most Popular