On Mon, 10 Apr 2017 17:08:09 -0400, "Mr. Luddite"
wrote:

Then, when the U.S. Army Air Forces on the Marianas Islands ran out of
conventional thermite incendiary bombs

That is not exactly what you said before.
They were still fire bombing the place.
Considering what they were trying to set on fire, thermite probably
wasn't that great anyway. That creates a small, very hot fire. Napalm
spreads a wide ranging fireball.