These little creatures carried something no one knew yet... The Black Plague. People knew rats existed and it didn't bother them that they were everywhere.
Its okay, it will be alright soon.
Since the rats were everywhere, it was normal. Soon people got to get this mysterious sickness. Kids,teens,and adults had this disease. First it was just some people, then it started to spread, people to people. Every time someone touched something then someone else touched it, it spread even more.
One night 3 men went out to get away, but little did they know, one of them had the plague and went to spread it to another area.
More people got the plague. 25,000,000 people where affected. And soon after the plague the whole feudal system changed, now for whoever didn't die, life was better. The plague is a huge part in history. Now life is for the better.