On Parshas Tazria-Metzora 5751 the Rebbe taught that the fastest way to bring Moshiach is through learning inyonei Geulah uMoshiach.
Rabbi Gershon Avtzon, founder and Rosh Yeshiva of Yeshivas Lubavitch Cincinnati, presents shiurim on the topic of Moshiach and Geulah encompassing many aspects of the Torah