Which tragedy causes the conflict for antigone?

What caused this tragedy was the death of her brothers Eteocles and Polyneices during a battle for Supremacy in Thebes.

The tragedy which causes the conflict for Antigone is the death of her brothers, Eteocles and Polyneices, during a battle for supremacy in Thebes. ANtigone is determined to give Polyneices a decent burial, seeing this as right and proper in the eyes of god, even though the new king, Creon, has expressly forbidden the action.           Hope this helped!  ; )

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