Part 1:
You must defeat five wolfmen to advance. Use any available AoE skills to speed the process. Defeating the group of Spear-wolves that charge at you initially will be sufficient; the Bow-wolves can be ignored more or less entirely, as their damage output is fairly low.
Part 2:
You must defeat Hakuro Whitefang by completely depleting his HP. It will be a long fight as he has high HP and has a arsenal of large, damaging AoE attacks. Attempt to practice dodging his initial attacks in preparation for when he combines them as the battle progresses. There will be many overlapping effects towards the end of the fight.
After a while, Alphinaud will dismiss his Obsidian Carbuncle and summon a Moonstone Carbuncle that generates a small defensive AoE. Stepping within this grants the Shining Moonstone buff, which lasts for one minute and increases the damage you deal whilst reducing the damage you take.
This sword is a symbol of everything my father fought to achieve. A weapon claimed on the bloodsands, and with it fortune and glory. Its flames consume the unworthy, but by fire was he reborn.
That he should bequeath it to me now...to carry on his legacy... Well, I shall endeavor to deserve it. But I'll be damned if this is his final battle!
Once we begin, there will be no respite until it's over. Are you ready, my friends?
Very well. Brace yourselves. This should be quite a specta-
These "wolfmen" of whom you speak hail from Doma. They were coerced into fighting for the Empire—spirited away to a foreign land and told that if they disobeyed, the lives of their kin would be forfeit.
But their homeland has been liberated. They have no reason to continue serving their imperial masters!
Ere you engage them in battle, I beseech you: grant us a moment to go and attempt to convince them to lay down their arms!
I am loath to gift our enemy more time to prepare...but if there is a chance that this conflict can be avoided, I suppose we must take it. Go then—but be quick.
We will wait here for the Lupin to arrive. Steel yourself, my friend. Though I hope to resolve this without resorting to violence, it would seem wise to prepare for the worst...
Doma is free! Lord Hien has returned and driven Yotsuyu and the imperials from your lands. We were there—we helped him! There is no need for you to fight for Zenos!
All Lupin shall know of Doma's liberation, and of your part in it.
When you breach the gates, we shall turn on the imperials as one. With fang and claw we shall rip open the throats of our masters. This the White swears.
Such a curious thing, destiny, to see us meet with friends of Lord Hien in this distant corner of the world. But we shall not keep you—your day is not yet done.
The vice marshal's strategy for breaching the gates was most ingenious. A pity he did not account for the magitek armor—but to be fair, they did not account for the Domans either.