Campaign is a type of Expedition. Campaign is a synonym of Cause. Cause is related to Trouble. Trouble is related to Situation. 
Obvious is a synonym of Apparent. Apparent is a synonym of Evident. Evidence is derived from Evident. Argument is a type of Evidence. 
Expedition <--IsA-- Campaign <--Synonym--> Cause <--RelatedTo--> Trouble <--RelatedTo--> Situation 
Obvious <--Synonym--> Apparent <--Synonym--> Evident <--DerivedFrom-- Evidence <--IsA-- Argument 