User blog comment:Zathronas/Speculative author: Who is Summer Rose?/@comment-16241789-20140809065916/@comment-16241789-20140809073513

I think the Great War was several generations ago. Of course, this is only going off what Jaune said about his ancestor fighting in it.

2) Yeah, the sacrifice is confirmed. And I kind of forgot about Ruby's father. That's my mistake. I'm still putting together theories on how Yang and her family factor into this, but that's for another time.

3) You're pretty much spot-on here. I used an example to explain the possibility of a cover-up, but it's also a definite possibility that Summer was just one of many. I think the main thing is that the whole sacrifice is built up to be something pretty big, mainly because it involves the main character. It's possible that it was actually either not a known sacrifice (as you said), or just one sacrifice of many in some big battle (but then again, it's a relatively [on a cosmic scale] recent skirmish that we haven't heard of).