You need to check the order of battle for every conflict you listed...
I'll take you apart point by point...
The French ceased to be an effective fighting force after Verdun and a battle doesn't necessarily win a war nor does a simplistic analysis of one operation....which was conducted by the 2nd and 3rd US Army ID. There were two marine battalions supporting the divisions in the second wave but they were slaughtered, cause they're assault troops and that's their job. The operational commander of the marines was Army General James G. Harbord ..yeah the marines were commanded by an Army General that was later made an honorary jarhead.
WWII, what can I say...the Europe first strategic plan sent the B team to the pacific; Actually, the Soviet Union won both theaters because the minute the Japanese saw the Soviets storming into Manchuria they surrendered right quick to avoid a Soviet invasion of Japan...Fire bombing, two nuclear bombs along with taking isolated garrison islands couldn't break the Japanese fighting spirit but the Japanese had tangled with Soviets and decided it was better to sign a peace treaty in 1941 than tangle with them again.
Guadalcanal..see 25th US Army Infantry Division history...
Bougainvillea...see 37th US Army Infantry Division history...
I neither have the time nor motivation to address the rest of the WWII campaigns you you listed but every significant land mass in the pacific required the A team to do the heavy lifting.
Incheon, sure that was an amphibious operation,by the 1st Marine Division and the 7th US Army Infantry Division and you neglected to mention the role of the 1st Cavalry Division. As far as the Yalu river is concerned...The US 8th Cav was the first American unit to be attacked by the Chinese and eventually the 8th Army was forced to retreat in the longest retreat in American military history. I'm not an ideologue, I endeavor to see the world as it truly is as opposed to persisting in delusion, no matter how comforting...That's some Carl Sagan.
Vietnam: Really? You bring up a war that was lost? I'll give credit to the Marines for the "strategic Hamlet" program because even though it was ultimately unsuccessful ..they borrowed it from the Army Green Berets.; They won the war in the central highlands.
Iraq...I think you're confusing Desert Storm and Iraqi Freedom...A good friend of mine was an Army MP Captain that participated in the pacifying of fallujah..
What impenetrable barrier are you talking about? Sand berms and oil trenches...18th Airborne corps was hell on wheels breaching those 16th century obstacles thanks to our combat engineers in a matter of minutes.
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