|The following is based on Fallout Tactics and some details might contradict canon.|
This grim, desolate land is a wasteland in every sense of the word. It still bears the scars of the war, with death lurking behind every corner and treasures hidden amid the devastation. The few who live here are hardy people, whose bleak existence is built through blood and sheer determination. These isolated groups of people were expected to provide hard to break and annex by the Eastern Brotherhood.
More importantly, it was also the region where one of the original expedition's zeppelins was lost, with its crew presumed dead. As such, many soldiers were ill at ease expanding into it. Their fears proved to be well founded, as the Brotherhood clashed with the greatest foe they have seen yet. Gammorin's Army was a deadly foe, inflicting terrifying losses on the Brotherhood. However, thanks to perseverance and superior industrial base, the Brotherhood was eventually victorious, securing the Belt at a terrible cost.
The Belt appears only in Fallout Tactics.
- Fallout Tactics chapter endings: "The Brotherhood's ranks have grown, and with this swell of numbers they find themselves coming closer to the ultimate goal the time to expand is now. Leaving an outpost behind the warriors begin moving westward into a region known as the Belt. It is a scarred and desolate land, filled with death and relics of a time before. Those who dwell here have scraped together a bleak existence built on blood and grim determination; these isolated people are as hard as any in the wasteland. Pressuring these people to join the ranks of the Brotherhood will not be easy, many will not understand the Brotherhood's glorious vision to reunite the people, some resistance is expected.
While the inhabitants are dangerous, the land itself has the power to stir up fearful memories in some of the Generals and Elders. They tell of the ill fated flight across the mountains, and how their mighty airships were torn apart. Old law and surviving data suggests that at least one of the great Brotherhood zeppelins was lost in this very region; if it were located there is a chance that the equipment and supplies contained could be salvaged and returned to the noble purpose for which they were intended. There might even be survivors, but few hold any real hope of this, only time will tell."
- See this article for details and sources.