This is the 3092nd most frequent Turkish word.
birliğinde
"Birliğinde" means "in/within the unity" or "in/within the association."
Here, 'birliğinde' is used to express being in a union or alliance with something.
Ordu ile ittifak birliğinde hareket edildi.
The actions were taken in unity with the alliance of the army.
In this case, 'birliğinde' denotes physical location or the conceptual association with an organization called 'birlik'.
Eğitim birliğinde birçok yabancı öğrenci bulunuyor.
There are many foreign students in the educational unity.
Here, 'birliğinde' references being in the conceptual context of workplace unity.