Yes, the Germans (possibly Hitler himself) coined the term "assault rifle" during WWII.
Several different sources say it was Hitler, himself that named the rifle "
Sturmgewehr".
in a nutshell, the story is this...
In late 40 or early 41, when Nazi Germany was winning, Hitler ordered that no effort be "wasted" developing new rifles. Development of future submachine guns (
Maschinen Pistole - machine pistols) could continue.
Some engineers in the German firearms industry had been working on a new "light rifle" round and rifle for it. They continued developing it, disguising their work by calling the gun an MP not a rifle.
Small numbers were field tested on the eastern front in 43, and more in early 44 (MP 43 and MP 44). At a conference, Hitler asked some officers what they needed more of, and was told, "more of the new rifles!"
WHAT NEW RIFLES???!!!
Finding out his earlier orders had been disobeyed, Hitler was furious. After a couple days, he had calmed down enough, and some of the new rifles were demonstrated for him. Seeing what they could do, Hitler changed his mind 180 degrees and said, "this is what I want! this is my
STURMGEWEHR!
The designation for the MP 44 was changed to Stg 44 (from
Maschinen Pistole to
Sturmgewehr -from Submachine gun to Assault Rifle), and the term Assault RIFLE has been in use ever since.
One major point where people get confused is that the political term "assault weapon" (which are ALL semi autos) includes certain rifles, so the underinformed think that since it is an assault weapon, and its a rifle, then it is an assault rifle. Which makes sense in English class, but is WRONG in engineering class.