My thought go back to logistics. Weight, fuel shipping, bridges etc…This would seem to be important. If the only advantage the Abrams has is armor and a 120mm. The drone thing could reduce the advantages of vertical armor making the Abrams in the same vulnerability league, but a lot heavier. The M1E3 concept is lighter but we are many years away from fielding that. What I see is an interim stopgap vehicle. With a 1000 Bookers you could supply the Air borne, Marines, light infantry divisions and the Calvery. The M1’s would be mostly for armored and heavy infantry divisions.
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