The League of the Silver Marches was an ideal that failed.
Silverymoon was blamed for its failure to aid Sundabar from an orc horde. Its reputation in shatters, the Gem of the North lost political power and allies.
However, the threats in the North have not diminished. The Lords’ Alliance is too far away to provide proper aid and support to the people of the Silver Marches. Without the League, the Silver Marches is likely to fall to the next major threat that raises its head.
That is unacceptable to a small number of concerned individuals, and so they make their plans to ensure that this will not happen.
Travel through the Silver Marches. Forge alliances and friendships. Overcome opponents and obstacles. Help restore Silverymoon and the League of the Silver Marches.
This campaign setting provides details on the Silver Marches in 1490DR and includes an adventure adaptable for 1st to 15th level."
- from the publisher's blurb