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 M48 Patton medium tank was the most common United States tank to be used during the Vietnam War. It was involved in the only tank vs. tank battle between the US Army and the North Vietnamese Army during the Vietnam War, the Battle of Ben Het in 1969, when several M48 Patton medium tanks fought 10 North Vietnamese PT-76 light amphibious tanks.