As Londigul Ellic urges, head out into town and kill 20 of the invaders. With each invader you kill, you'll receive a message:

You have killed an Invader.

You'll have to manually keep track. Eaters, Viamontian Knights and Viamontian Mages all count towards your total. If the town is too crowded, there's another good spawn spot on the outskirts.

Once you've defeated 20 invaders, return to Londigul Ellic for your next task.

Londigul Ellic the Armorer gives you Glenden Wood Militia Title Token.
Londigul Ellic the Armorer tells you, "Congratulations, you are officially a member of the Glenden Wood Militia. Hand this token to Tomo Genza if you wish to have the Title of Glenden Wood Militia."
You've earned 260,000 experience.

Londigul Ellic the Armorer tells you, "The Viamonts are trying to cut us off and prevent us from getting reinforcements. They have set up blockades on the three roads leading North, East and West out of town."
Londigul Ellic the Armorer tells you, "Follow each of the roads out of town and eliminate the Viamont regiments stationed at each."

As Londigul Ellic instructs, take the north, east and west roads out of town. Each road has a blockade set up, guarded by Viamontian Knights. At each of the three roads, you'll need to kill at least one guard to go on to the next part of the quest.

Londigul Ellic the Armorer tells you, "Well done, I'm afraid they may send more regiments to those blockades though. Come back tomorrow, the militia needs you."
Londigul Ellic the Armorer tells you, "Here's a small reward."
Londigul Ellic the Armorer gives you Glenden Wood Recall Orb.
You've earned 3,857,445 experience.
Londigul Ellic the Armorer tells you, "If your looking to help out more. Tomo Genza may need you for a mission."

Next Tomo Genza will ask you to deliver a message to a Captain of the Royal Guard in one of 4 cities.

Tomo Genza gives you Sealed Note.
Tomo Genza tells you, "I need you to deliver this very important message to the Captain of the Royal Guard in the Arwic Meeting Hall."

This part of the quest has 4 level breaks. You may choose to do more than one part, although you will need someone of the right level to spawn the strike force. In order to cause the spawn, you must deliver your note to the Captain inside the Meeting Hall. Each Strike Force Leader drops a Viamontian Helm. In order to hand in the note and cause the spawn, you must be of the proper level for that meeting hall; however, you do not have to be the proper level to pick up a helm from the defeated Strike Force Leader. If the note dropper speaks to the Captain after the force is defeated, the Captain will also give the note dropper a helm. Each note, therefore, can yield a maximum of 2 helms. If the note dropper also gets the kill, only one helm will be received.

Warning! The spawns are dangerous! Make sure you have a few friends ready to fight before handing in the note.

Following are the list of the 4 Meeting Halls for each level break and the creatures within.

Captain Anrayl tells you, "The people in Glenden Wood are under siege. I'm organizing counter offensives, but the information I'm getting from the town is sketchy at best. Do you have any word from the militia there?"
You give Captain Anrayl Sealed Note.

Captain Anrayl says, "It's another Strike Force! They keep attacking . Help me fight them off!"
The Viamontian Mages send a volley of flame bolts hurtling toward the Captain of the Royal Guard. The message from Glenden Wood is incinerated and the Captain is thrown back by the explosive force.

After you've defeated the spawn, speak to the Captain again. He'll direct you back to Glenden Wood.

Captain Anrayl tells you, "From what I was able to read of the note you gave me, Glenden Wood may be a diversion so the Viamonts can strike at their true target, whatever that may be."
Captain Anrayl tells you, "Thank you for your help soldier, now get back to Glenden Wood and crush those bastards."

Speak to Tomo Genza for an experience reward (level dependent - caps at 32.5 million)!

Tomo Genza tells you, "Hmmm, from what you tell me I'm worried the Captain didn't get the whole message. Don't worry about it, I'll send more messengers just in case."
Tomo Genza tells you, "Here is a small reward for your services."
You've earned 19,287,225 experience.
Tomo Genza tells you, "Return in a week and I may have another task for you. Oh, if you found a Viamont Helm Londigul Ellic the Armorer may be able to refit it for you."

You allow Tomo Genza to examine your Viamontian Lord's Helm.
Tomo Genza tells you, "You want to give this to Londigul Ellic the Armorer."

Give the helm to Londigul Ellic the Armorer and he'll return a wearable version. He'll also inform you that if you'd rather have more xp, give the finished helm back to Tomo for additional experience (additional experience caps at 6.5 million).