I know that 'were' is for singular and 'was' is for plural but what about two words in the following manner: 'The food and fuel were / was (?) in 55 gallon drums...' My feeling is it's were to describe the two words separately but I'm still a bit 'errrm' about it.
Were can be singular or plural: They were in the house. You [one person] were in the house. Was is singular, not plural. I was in the house. Past tense of the verb to be. Conjugate it: singular I was you were he was plural we were you were they were Were. They [the food and fuel] were in 55 gallon drums.