User blog comment:The old baby/New timeline Idea?/@comment-32656-20130208074059

As Sal noted, you're talking well after the Black Death. Them/her dying of plague just doesn't make much sense.

Nor is her dying in battle likely - she did not actually do any fighting, and was more of a mascot than anything. And if she does die from the war in some form? Instant Martyr, and the French go as in otl.