@Nudhul @Terry WW2 Marines had no choice but to be the best and worst of all soldiers. If you weren't you died pretty quickly.
The Marines of Desert Storm and GWOT were organized into a very heavy, hard-hitting amphibious force with a higher density of medium machine guns than your typical army infantry battalion. The Marines high-level mission was to kick in the door to allow the army campaigning forces to take over. Literally state-level door-kickers. Around 2020-ish they complete the "transformation" into a "littoral combat force" and gave up all of their tanks and heavy artillery. Essentially what they are now is infantry but with a mandatory swim qual.
