the persian invasion was a delayed response to the defeat of the first persian invasion of greece. in 500 bc the lonians settled in the western coast of asia minor and rose up against persian’s king darius. after six years, the rebellion was ended. in 490 bc the persians sailed to punish the athens. darius fought against athens and promised to punish them because they went to persian land to help the ionians. this first persian war was ended by the athenian victory at the battle of marathon.