Hit to reality

Everyday we wake up and go to work, go to sleep and do our daily lives in hopes of beating the enemy. The enemy is deadly and vicious. It will take us down with no effort at all and with no pattern. We have our people that are so skilled researching the enemy but as of right now all we can do is protect ourselves. My name is ...... just kidding... no personal info allowed. Anyways let's rewind to the past and see if anyone can guess what this story is about?