The federal definition of MI for PASRR is best understood in terms of the four âDâsâ: 1  A diagnosis or suspicion of a major mental illness such as schizophrenia, bipolar disorder, major depression, or an anxiety disorder such as OCD. 2  An absence of dementia. 3  A well-defined duration.  A particular level of disability.
Well-known World War II tanks were the German Panzer IV, Panther and Tigers, Soviet T-34 (produced in the largest numbers of any tank of the war and second most ever), British Matilda, Churchill and Cromwell, and American M4 Sherman (second most produced tank of the war) and Stuart tanks.
The Vietnam War M551 Sheridan tank, which had an aluminum hull, steel turret and steel 152mm main gun, weighed about 17 tons combat loaded. The tank served in Vietnam from Janâ¦uary 1969 until about April 1972. It served with all US Armored Cavalry units in South Vietnam, and had a complement of 4 crewmen.