It was also an associate and ally of the Swiss Confederation and played a role in the build up to the Thirty Years ' War .
The Grey League allied itself to the two other powers of Raetia in 1471 , forming the Three Leagues .
Grey League was also an associate and ally of the Swiss Confederation and played a role in the build up to the Thirty Years ' War .
The Grey League allied itself to the two other powers of Raetia in 1471 , forming the Three Leagues .