Eastgate was constructed by the Sons of Rakkis during their crusade against the West, the structure serving as a fortified outpost against their enemy's counterattacks. After Rakkis's previous successes in Aranoch, it was here that he regrouped his forces after the Barbarians and people of Ivgorod proved to be unconquerable. After restoring his men's morale, Rakkis led his forces west, eventually founding Westmarch. Eastgate later fell into abandonment.
The keep briefly fell to Andariel and the Sisterhood was splintered during the time of Diablo's return. However, the cathedral was cleansed by a group of heroes and Andariel was defeated. Now, the training grounds of Eastgate once again hum with the sound of bowstrings and battlecries.