Don’t be such a fudd. No one has carried the .45 in any appreciable numbers since the Vietnam war. In fact, the pipe hitters wanted the Glock 19 so badly they had to jump through crazy bureaucratic hoops to get it. They simply wanted the ultimate in ruggedness and reliability when their lives were on the line.

None of this is secret. You can also watch endless YouTube videos on the subject.

https://www.wearethemighty.com/articles/why-the-glock-is-the-sidearm-of-choice-in-special-operations/

https://www.19fortyfive.com/2022/08/glock-19-the-gun-the-fbi-delta-force-the-cia-and-army-special-forces-love/

https://www.msn.com/en-us/news/us/the-clever-acquisition-how-u-s-army-special-forces-obtained-glock-19-pistols/ss-BB1lMNUx?ocid=a2hs