The assembled nations hadn't noticed when the first country had disappeared from the United Nations large meeting room. Then again, they had never noticed the country in question anyways so that was nothing new. Canada had already disappeared from all of their minds before he had disappeared from the meetings that the nations held once a month. He wasn't seen again. Their ghost was gone.
They may not have noticed the first disappearance but, it was kind of hard to ignore big Russia's and stern Germany's disappearance as well. They were gone, then their siblings stopped showing up and soon so too were the other nations. No one knew where they went and the world meetings were canceled, everyone left thinking that it was too unsafe to continue to gather in large groups like this. When they seemed to be in danger. Everyone left and went home, and stayed there cutting themselves off from the rest of the world trying to protect themselves however they could. No one thought to band together.
England had unfortunately been sick for the first two meetings that year when this problem had started and had stayed at home for the others so that they wouldn't get sick as well. Besides, he knew that nothing was going to be accomplished anyways, missing two meetings wasn't going to hurt anyone.
It was the week before the proposed date of the meeting of the nations during the fourth month. (Arthur just hadn't felt like going to the meeting during the third month either, that time he wasn't sick though, he just tried to claim he was. Sick of all the arguing, that is, he just didn't care to mention that little bit to the human staff that was scheduling everything.) But, this month he was well enough and prepared enough to go to the World Meeting and that's when he finally received the first sign that something was terribly wrong with the world.
It was when Arthur had tried to call his boyfriend for the past year, Mathew, who was otherwise known as the representative of Canada. But, Mathew had never picked up. The phone rang six times then gave up leaving Arthur to leave a small message of "Hello? Mathew? Why haven't you been answering any of my text messages? Is there something wrong? Where are you Mathew? What is going on?"
Arthur had never gotten a reply back, to that message or to any of the texts and calls he sent to the other nations either. No one was replying, no one was there and there was no one to tell him anything. He was all alone completely left in the dark about what had happened and with no idea or even a clue on where to start looking for the other nations. He was all by himself. There was no one beside him now, it was up to Arthur to find and successfully rescue all of the other nations it seemed.