Research

Hello
I have a question.

I want to defend city B with units from city A.
In city A I have Phalanx researched, but in B I do not.
The defending units get their bonus from city A, where they are from, or to have the bonus, city B must also have Phalanx researched?

Thank you!
 

Topolino 98

Pegasus
There are two cases:
  • if city A sustains city B, only city B researches work, and only Premium services of the possessor of city B work (if city B hasn't researches and city A has them, they don't work);
  • if city A send a colonial ship and start a siege on city B, only city A researches work, and only Premium services of the possessor of city A work.