Roger R wrote:

The Germans used concentrated hydrogen peroxide as a propellant for their V-1
flying bomb. It was used to rapidly generate steam for the launching catapult.
They called it T-Stoff.

Also used on one of their rocket propelled fighters, Heinkel,Me 262 or
something; some otaku anorak will know. The planes used to crash
frequently on take off or landing. I've read that if the pilot escaped
instant cremation, he'd probably get dissolved by the hydrogen peroxide.