How to write a History NEA Introduction?

Hi, I've written my history NEA a long time ago but I recently got my feedback and was told that I needed to add a bit more to my introduction. My teacher didn't specify what I needed to add so would someone please be able to show me an example of a perfect History NEA intro, or a list of what you need to add please?
So far I have:
-A topic sentence
-Defining the key words
-Explaining my argument and counter argument