The last of Pure (Part 1)
After the first war with the Dalki, many of the large continents from before were nonexistent. Due to fights, large spaceship blasts, attempted nuclear missiles that had backfired, and more, it had caused much of the land to split and the sea levels to rise.
Some of the land had simply been sunk into the sea or had burst into nothing but particles to go into space or the layer of atmosphere around the world. However, what this did was cause many islands to appear all over the place.
Many of them were left unexplored due to the fact they were just too small to make a settlement or a Shelter on. So they just stayed there, doing nothing.