Guild Wars 2 Walkthrough Part 2 – Human – Defending Shaemoor

Protect the people of Shaemoor
Objective 1: Talk with Corporal Beirne
Head to the first NPC in front of you to find the Corporal.

Corporal Beirne: “Everyone get to the Inn! We can protect you at the inn!”

Objective 2: Go to the inn
Head to the South from the Corporal, down the hill. There are a number of Centaurs between you and the Inn. Take out as many many or few as you would like as you make your way over to the inn. None are particularly hard. Just remember that the more you use weapons, the more skills you unlock for them.

Objective 3: Talk to Sergeant Walters

Head straight for the back of the inn and talk with Sergeant Walters, the only marked NPC.

Seraph Soldier: Sergeant! There are more centaurs on the other side of town. Captain Thackeray's calling for reinforcements at the garrison!”
Sergeant Walters: “If he's calling for help it must be serious, but I can't spare anyone”.
Hero: “I'll go. Captain Thackeray's never failed Divinity's Reach. If I can help him, I will”.
Walters: “Balthazar bless you! That's the spirit that'll win this war. Good luck”.

Objective 4: Go to the garrison
Head out and to the East from the Village of Shaemoor. Just follow the cobbled road. There you will find your next objective very close by

Objective 5: Help defend the gate
Call out what reinforcements you can and join into the fray. Nearly a dozen Centaurs will come at the gate. Keep fighting until; the gate behind you opens after the last of them are dead. When you see Seraph Soldiers head for you then it is open.

Head to the opposite side of the garrison and attack the centaurs over there. Lay into them as best you can. There are a lot of centaurs. Things only get worse when the shaman runs through. He summons a massive Earth Elemental to attack the garrison.

Objective 6: Defeat the greater Earth Elemental
First, focus on the hands as Thackeray commands. If you get below half health, head back to him to get some restoration. Just keep fighting until the Earth Elemental triggers a cinematic where it simply explodes. After that, you have finished the opening mission for the humans.