It's surprising how many thing are oriented to right handed people:
Musical instruments
Cameras
Power tools
heavy machines shop tools (lathes, drill presses, saws, etc.)
airplanes, boats, helicopters
kitchen utensils and appliances
scissors

and thanks to thoughtful engineers, so many of them have been re-engineered, too!

As I have aged, my dominant eye has slowly changed. I'm still firmly left handed, but my dominant eye has changed in the last couple of years to my right. The most evident affect is when I'm shooting shotgun. If I don't purposely close my right eye prior to calling for the clay bird, I will see the side of my barrel instead of the top. Thus most likely to miss. When shooting bullseye, it's not an issue with a red dot, but with irons I do find myself pushing the pistol to align with my right eye. Again not so good an idea. Rifles do not seem to be an issue. I shoot and am competitive in Black Powder Cartridge Silhouette and Target Rifle and still currently hold five National Records using an original Trapdoor Springfield.

Woody

Woody, knowing nothing about those weapons, do they fire similar to a Thompson Sub-machine gun...?

For those who are right handed but left eye dominant, the crossover stock is just the thing. This is a Purdy shotgun.

https://i.imgur.com/KAlhllL.jpg

Back to the original question ,"were all Germans right handed?" Well, no. I would suspect that about 5 to 10 percent were left handed, just like everywhere else. But, I imagine that the Wehrmacht had a system for "weeding" them out, if they were a "problem". It's really no surprise that most objects are oriented for right-handers, as they make up 90 to 95 percent of the population. Anyone who says, "well, just make a mirror image", Or "just reverse it" has obviously never done that.

In the old days you had to adapt to the system as the system was not going to adapt to you.

:evilgrin:Several people in my lineage were lefties. Born turn of the century or before.
Mother and Brother as well.
They had tales of having to hold rocks or coal in their left hands or actually have the tied behind their backs in order to become righties.
Didn't work and left bad memories.
In my service time, 60s, lefties were required to shoot right handed on training ranges.
I have no memory of how that worked.
I never heard anything about "weeding out" lefties. It never happened in my experience and I don't believe it ever did significantly.
They may be sinister or mutants, but still useful in general.
Ones in my family seemed pretty normal-mostly.:evilgrin:

I served from 72 to 92. I was not required to shoot right handed, but prior to our first live fire, I was issued a rifle that ejected it's brass forward, so as not to strike me between the right ear and my helmet. Other than this one accommodation, I didn't experience any issues, although I was not issued a left-handed holster when required to carry a pistol.

Woody

GT, It's interesting to find that you are also left handed. I was never forced to switch as was my Dad, but did switch to shooting right handed, when I learned that that was my dominated eve. Tom H.

left handed and left eye ...
 

I was always nearly blind in my right eye from nearsightedness. Right hand wasn't much good either... I had a close friend in high school and also as a freshman in college, (he got drafted and sadly, we grew apart!) But, he was totally ambidextrous and I invited him to play a round of 4 wall handball... I'd played for about two years then, and he was just starting.. In three straight games, he totally destroyed me! :eek::eek: That was about the end of my 4 wall handball career? It didn't really bother me, as about that time I discovered bars, girls and beer! Most of that is a blur... :) ... best, til....lat'r....GT:cheers:

would this model 9 holster be for a left handed soldier ?

Primarily a close quarters weapon system, aiming with precision was not the top priority....