Возможно ли использование в описании сотрудничества сторон?
Нет, не может.
Yes, but only when referring to the action or state of joining or junction. From the summer of 1915 to March 1916, Doullens was a junction between the French Tenth Army on the Arras front and the Commonwealth Third Army on the Somme. The consumer union became a junction between the citizenry and the state.