Was there a war with the Outside? I thought Jim said when TWG created reality he made it so that the Outsiders could not enter without a mortal invitation. That doesn't sound like a war but TWG telling them what they could and couldn't do.
Yes and no. We know the Old Ones ruled reality and were kicked out and/or locked up. There's a WOJ that the Outsiders were told to stay out but mortals could invite them in. There is also a WOJ about how the Outsiders hate Creation because it is so bright and noisy. Finally, there is one about how the Outsiders are always the Outsiders and just look different depending on what universe they are trying to get into.
I'd say there was a pretty big chance they fought to get in originally and the separation of Light from the Dark and chaos of Outside was probably an allegory for that.
Power has purpose after all. Why did TWG need all those angels to begin with? Why did he need archangels, one of which was a general? Why did he need one that was a Lightbringer? Seems to me that they were the original conflict. While the angels and archangels fought and protected Creation while TWG was Creating, I suspect the moment the lights switched on the Outsiders got upset.
Lucifer rebelled against TWG at the beginning of Creation. Per Jim, we know that part of this messing around is partially what caused the difference in Creation stories. Apparently this is also when the star born thing started. Why and how could Lucifer rebel? Well, all angels (including the archangels) must have had enough free will to do that. But why do it at all? Jim has said that Lucifer is in an argument with God (this is from an obscure WOJ from a FB group) and that the argument has bent the universe out of shape, but it also limits Lucifer because he still wants a universe. He doesn't want to blow it up.
So my take is that Lucifer didn't agree with mortals having Free Will and endangering Creation. His core purpose was likely to defend Creation. So he sees mortals as a HUGE threat because they can invite Outsiders in. So everything he does is about proving that point, that mortals and Free Will are a bad mix. Now I might be wrong but I think I am pretty close.
There are myths about the dragon that had to be defeated before creation could even begin. Marduk defeated Tiamat and created heaven and earth from its body. It could be that the outsiders first had to be driven back before creation could even begin.
Pretty much.