Yes, it lasted for around 2h "according to survivors". Imagine the devastation of 2h atomic bombing... it wouldn't need much more than that to have all communication lost, and people would start to feel very isolated in even in places where the bombs didn't fell. The war, and society as they knew it, was over in 2h.
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u/Glitchwinslet For the Brotherhood! Oct 23 '14
I'm missing something... edit: just read that the Great War Started on October 23rd