They also served in WW I, WW II, WW Korea, Vietnam, etc...
I think the key there is that the 1911 was the MAIN sidearm, and went up against the Luger, P38, Berettas, Tokarevs, and other foreign revolvers. It also was against the BHP during WWII.
The S&W M&P was issued in much smaller numbers, and for a shorter period of time.
I'm more of a revolver guy, and a S&W guy, but facts are facts.