I entered this fort(south of Kvatch) and after some time I found this old guy who's nick name was artic bear or something after I killed him and his gang(took me a couple of tries) I came across his battle plans and a letter about these bosmer ranger near anvil which triggered a quest, also the battle plans talked about some armour called the dreaded armour and it highlights two forts in the nibenay basin which has something involving the armour and some more atrifacts.
Now my questions are:
How do I carry on with this bosmer ranger quest? It suggests I talk to anvil authorities but its not even a topic of conversation.
Also is their any truth to the atrifacts and armour? If it is real are they worth pursuing?

You need to be specific, and tell us which mod is causing this quest. There are at least two very large mods that affect Kvatch.

I think this mod is thieves arsenal and you found it before the quest which involves it.
I don't know they are real or not, but why don't you find it yourself? (Which will be a experience) and can you tell me which ruins is the plans pointing?
And give us some more info.

I'm using kvatch aftermath by Giskard, however I don't know if it is that mod the quest has came from it might be OOO as they put the posters in the cities to warn people about dangerous caves etc. Anyway I did as from the deep intended and went across cyrodil and found one of the forts called fort flecia, isn't that one of the places that the people in cheydinhall(sorry bout spelling) talk about?
Well I cleared it out and it turns out the battleplans are part of the shadows from valenwood quest and apparently all these "armies" are after the atifacts, the armies consist of necros, bosmer rangers and raiders. After fighting this man of noble birth he was quite the fight with him and about three raider commanders, I found some more battle plans indicating I go north and clear out two more forts one being fort facian, which I have yet to do as my computer just died on me, so I will keep updating as I go, it may take awhile as my horse seemed to fall out of the sky and die as I left the fort so I have got to walk.

Dasek Moor is given as a part of Kvatch Aftermath. If you have the correct quest clicked as "Active", then you can go back and read through the updates you missed.

Arctic bear is part of OOO. I found those two ruins in the nibenay basin some time ago and I don't have any Kvatch rebuilt or aftermath on. But watch out, those two ruins are heavily gaurded, no low levels should even try.

I finished the quest na dit is hard took me sveral attempts in some of the forts I just kept finding myself surround by raiders etc.
Thanks for the help.

For the record the kvatch Dasek Moor Quest is just a patrol for "going through the motions", you are supposed to "not want to do it" and so cheat by not actually entering Dasek more at all. Just turn up outside it to fool the elder council.

After that its considered done.

So this is not kvatch adding that guy, its an entirely different mod.
Still no conflict here, so everything is ok.

Giskard

Interesting note, Giskard. I never thought about fooling the Elder Council. In keeping with TEC Secrets, I role-played and actually went into Dasek Moor and cleared it out.

I like your idea of rewards for good role-play.