Translate "Lórien in the War of the Ring" into Sindarin

Best I can come up with would be based on:

Lórien i Auth e Corf

or

Lórien i Oeth e Corf

This would be Lórien vin Oeth e·Gorf.

I am using the definite preposition here for mi "in".

Otherwise this could be Lórien vi Oeth e·Gorf.

Thanks!