From Beis Moshiach Magazine: A deep friendship prevailed between Lubavitch and Ger (Gura), that spanned many years. It began in the time of the Tzemach Tzedek when there began the first connections between Lubavitch and Kotzker Chassidus from which Gerrer Chassidus evolved. The relationship continued to a greater extent between the Rebbe Rashab and the Admor, the Imrei Emes of Ger, who tended their flocks at the same time • Full Article