Deeply troubled [Hektor] spoke to his own great-hearted spirit: "Ah me! If I go now inside the wall and the gateway, Poulydamas will be first to put a reproach upon me, since he tried to make me lead the Trojans inside the city on that accursed night when brilliant Achilleus rose up, and I would not obey him, but that would have been far better. Now, since by my own recklessness I have ruined my people . . .”
The first bold shows that he regrets a certain decision, and the second bold shows the result of his decision.
Possessive form usually means you add 's to the end of the noun that owns the object. You always put the noun directly in front of the thing that it owns in possessive form.