Originally Posted by the_13th_redneck

It's the redesigning of the military really.
They wanted something lighter, faster, more deployable with massive firepower. That's what they got. but what they forgot is that if you indeed have to hold onto territory, what you need is a heavy, slow, large military that can effectively control ground through presence.
This is why there was originally two kinds of units, the rapidly deployable units like elements in the Airborne divisions, Ranger Regiments, Special Forces, Marine Expeditionary Units etc. along side heavies such as the US 8th Army.
They all have their uses.