A little scared about campaign

Since we get to play as chief before he goes awol, I’m worried that we will spend too much time playing events that are pre/during HTT’s timeline. I really hope exploring this point in time does not take up most of the campaign. Looking forward to seeing stuff we haven’t seen anything of.

But we haven’t seen anything in that time period from anything but Ben’s perspective. And he isn’t really seeing much.

could it be possible that we play that mission that got chief marked a traitor?