When you get to the epilogue at the end and you can open fire on the friendly soldiers I remember winning that fight or am I confusing it with another game?

I only ask as I've finally starte listening to the game of the year podcast and they said you couldnt defeat the friendly soldiers

I just beat the game and looked up the endings. From what I read, you can win that fight, but appearently it's tough.

You can win the fight and it's not really that hard, just stick to cover and that's it. 
 
Here's the ending btw. 
  

Nah you can win that fight. You just have to run for cover as soon as you can. Since you're in the open, it'd be easy to assume you can't win that fight. Also there's no achievement for that ending.

Hopefully it's not the end. This game took me by surprise on how well it actually was. Hopefully we see a sequel or at least a spiritual sequel.

They give you an AA-12; how could you not win that fight?