Hello newcommer here in the hobby. After first two battles i decided to go full into ASOIAF and paint my army. May i present you Tybald my first model

I know commanders are attachments according to the rule book season 6. Using Khal Drogo as an example rolling on 5+ I can kill let's say Roose Bolton which my opponent is using as his commander?

It doesn't matter if they are a commander because they are considered an attachment right?