In Nevada, Julian heard of Boise, known as the 'Jewel of Idaho' and said to be the largest city left in all the wasteland. However, they had not found a suitable place to settle down. They braved the dangers of the Mojave Wasteland and eventually traveled as far as the ruins of Carson City.
Thus, when he was exiled, Julian and a large group of over twenty followers stormed out of California with as much gear as they could carry and headed east. However, the Elder council had little idea of just how much of a following Julian had. The Brotherhood of Steel found Julian's 'blatant imperialism', unsettling and ordered that he be exiled. Julian was exiled for holding that the Brotherhood of Steel's mission would be better served if they tried to conquer various settlements, eventually taking over the whole nation of America, and make their will the law of the wasteland. The Idaho Brotherhood was created when a Paladin by the name of Julian Rotter was exiled from the California Brotherhood in 2111.