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.
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.