What conflict motivates Antigone's actions?

Antigone and her sister were raised in the house of Creon. Her brothers Polyneices and Eteocles were casualties in a brutal war for power, each brother dying by the other's hand. Creon has declared that Eteocles will be honored with burial since he was a defender of Thebes, while Polyneices' body is left to the vultures and dogs. It is this edict that drives Antigone to defy the state, since she believes her brother Polyneices deserves the same treatment as Eteocles. She goes against her King and father to bury her brother.