During the Holocaust, he was captured and sent to a concentration camp with 5 others that had genetic mutations. He helped all of them escape with a cost. He lost his vision helping them escape. If he were still a nation, he would've regained his sight by now. But because of his dissolution, he never regained it.
Hetalia Headcanons
By Luna_theskelwolf099
I'm pretty sure this doesn't need a description More