The Sheridan was light enough to be dropped by ... and began a torturous effort to finally replace the finicky light tanks with a new “mobile gun.” The first effort, the M-8 Armored Gun ...

Since the withdrawal of the M551 Sheridan (in 1996), the U.S. Army has not had a light tank, although it was believed that such a vehicle should be in the arsenal of airmobile troops (three active ...