It's very obvious from a lot of sources that during the Rule of Man and the Long Night, Solomani explorers went corewards into what had been the Ziru Sirka and then spinward. Presumably the Hivers were in the way to trailing and eventually the Aslan immediately to spinward, but why didn't they go rimward?
I mean they did, sort of, but only for a couple of sectors. Contrast this with how far away some of the sectors with Solomani colonists are (like the ones out past the Spinward Marches).
So why did they stop?
There isn't much canon material for this part of space. About the only thing I can think of are the Valkyries from one of the GT alien modules (so dubiously canon). Since they're pretty scary, I suppose that might be one answer...
I mean they did, sort of, but only for a couple of sectors. Contrast this with how far away some of the sectors with Solomani colonists are (like the ones out past the Spinward Marches).
So why did they stop?
There isn't much canon material for this part of space. About the only thing I can think of are the Valkyries from one of the GT alien modules (so dubiously canon). Since they're pretty scary, I suppose that might be one answer...