As they say, “There’s history and then there’s USMC history.”
USMC uniforms began as cobbled uniforms taken from US Army uniforms. Look at the pants, as it’s obvious to anyone not parroting what they heard in boot.
And, FWIW, the Army had khaki class A/b uniforms and blue dress uniforms. I don’t know where you heard it, but the Army never went “all green”. We ditched the khakis for green and kept the blue dress uniforms. Now, they’re ditching the green so they can use the blue dress uniform in place of both.
It’s a bad decision, but the facts are nothing close to what you’re posting.
We agree to disagree.