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.
Answer Wiki. The most produced tank in history is the Soviet T-54/55 Medium/Main Battle Tank. The estimations on the numbers built range from 86,000â100,000+ over the span of 1946â1983.
M4 Sherman - Overview: The iconic American tank of World War II, the M4 Sherman was employed in all theaters of the conflict by the US Army and Marine Corps, as well as most Allied nations. Considered a medium tank, the Sherman initially mounted a 75mm gun and had a crew of five.