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A group within the Army, including, unfortunately, the Chief thinks they can preserve a role for the Army in a restructured force by giving up main battle tanks for armored cars and leaving most of the arty at home"
That is the first I have heard of a desire to do this "Armywide".
I do think a sizable reaction division wouldnt hurt. But doing something like that Army wide would be completely rediculous.
Two developments are occurring simultaneously. The first is to form several light brigades equiped with off the shelf armored car technology, already beginning production. I agree, forming a rapid reaction force while maintaining a heavy force for other threats is a good idea. I do have problems with implimentation because the initial design for the "armor" is a wheeled vehicle that won't stop a .50 cal. round but is still too heavy for a C-130.
The second development is long range planning for an Army of the "future," which at present envisions wheeled vehicles replacing the present tanks, ifv's and sp arty. The concept is the computerized battlefield of the future will be won by long range weapons (not yet designed) and airpower coordinated by computers, not needing old fashioned armored vehicles. This old dat is skeptical.