|The following is based on Fallout Tactics and some details might contradict canon.|
Following the extermination of the raider camp in Freeport, the leaders of the various raider groups in the Midwest decided to hold a conference to decide on a method of dealing with the expanding Brotherhood forces, and to attempt to come to some sort of agreement on facing the mysterious menace rising in the west.
Rock Falls was attacked and decimated by the Eastern Brotherhood of Steel during the meeting in order to capture a mysterious technological artifact discovered by the raiders, which turns out to be a hand of one of the Calculator's humanoid robots. The four raider commanders (Bo Duffy, Luke Daniels, and Daisy-May and Jesse Gomer) were executed, and the raider forces in the region were disbanded.
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The mission in Rock Falls is a simple extermination mission; all of the raiders need to be killed, and the artifact needs to be recovered.
Rock Falls has a massive depot of gasoline on the north side of the compound, which contradicts the fossil fuel crisis that the Fallout world was going through before the Great War.
Rock Falls appears only in Fallout Tactics.