The Soviet Union 's participation in World War II began with the Battle of Khalkhin Gol, with Japan in Mongolia in 1939. Later that year, protected with the Molotov-Ribbentrop Pact, it invaded eastern Poland about three weeks after the Germans invaded the west of the country.he Soviet Union 's participation in World War II began with the Battle of Khalkhin Gol, with Japan in Mongolia in 1939. Later that year, protected with the Molotov-Ribbentrop Pact, it invaded eastern Poland about three weeks after the Germans invaded the west of the country.
An altimeter does not actually measure altitude directly, but rather just atmospheric pressure. So an altimeter is actually a barometer created for a specific purpose. The altimeter uses the changes in atmospheric pressure to determine the changes in altitude.
The greater the altitude the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimeter.