You can say whatever you want as long as it's opinion based. You didn't say it was your opinion. You said it was what happened. That they died, going off to battle. That's not called having an opinion, that's called trying to make your opinion a fact and it's not what happened.
Me jumping to conclusions is how I will to see it. You jumping to conclusions is how you will to see it. However, that's in YOUR point of view. So stating that he died isn't accurate because it was never told if they did die or not.