For some reason the link in Philip's post didn't take me to either a video or an article. All I found there was a picture.
I don't know if this is the lecture that Philip had in mind, but here is a link to an interesting lecture by Heiser on Armageddon.
ARMAGEDDON Is Not A Battle Fought Where You've Been Taught
https://www.youtube.com/watch?v=WQnIEbJsCuc
Based on Heiser's identification of "Armageddon", we can see a direct correlation between John's vision in Rev 16:16 and Jesus' prophecy in Luke 21:20.