Why do people remember World War 2?

People tends to remember World War 2 due to certain events like the Holocaust happening. The Holocaust is well known genocide that occured during WW2, so people link the Holocaust to WW2. Another reason why is that due to the wide spread of it i.e. the pacific, europe and North Africa theatre. Millions on millions of people died, generations wiped out due to WW2, so it was pretty horrific.