Or in other words, DoD procurement forgot about the lessons learned from the Philippine Insurrection, in which the .38 revolvers could not stop drug-crazed Muslim rebels.
Some reports suggest Marines are not happy with their main Beretta M9s for their lack of accuracy and stopping power.
FYI, Since the Marsoc guys stopped using 1911’s they got rid of 9MM. My son was one of the first operators and they were the same until they tested and finally on the Colt.
By tha time my son had rotated out of Afghanistan and had about 3 years to stay around as a Marsoc instructor both pistol or rifle. ( switched and now an officer)