Regime is a synonym of Government. Government is related to Branch. Branch is a different concept from Stick. 
Unit is related to Piece. Piece is related to Card. Card is related to Celebration. you are likely to find Happiness in/at/on Celebration. 
Regime <--Synonym--> Government <--RelatedTo--> Branch <--DistinctFrom--> Stick 
Unit <--RelatedTo--> Piece <--RelatedTo--> Card <--RelatedTo--> Celebration <--AtLocation-- Happiness 