Affiliate Marketing Secrets

I need to write a one page report on the stance of the Kingdom of Sardinia during the Congress of Vienna.
It has to pertain to the re-allignment of Europe after the time of Napoleon.
I can find no information about where their allegiences lie.
The names: Savoy, Piedmont, and Italy have come up, but i cant make heads or tails of it.
With which major country was Sardinia affiliated?
What was their role if any during the congress of Vienna?