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.
1916 - The first tank prototype, nicknamed mother, was created by Britain during World War 1. 1926 â Robert Goddard launches the first liquid-fueled rocket. 1935 â First flight of the DC-3, one of the most significant transport aircraft in the history of aviation; 1939 - First jet engine powered aircraft, the Heinkel He 178, takes flight.