Long, long ago, when the Romans ruled over British lands, they used a measurement scale that was known as the 'mille passuum', which meant nothing but a thousand paces. This was measured by soldiers marching a thousand paces, or 5000 Roman feet. By conventional standards, this measures out to be about 1,479 meters, or about 1,617 yards, and is today known as the Roman Mile. This unit of measurement was used by the entire Roman Empire, who even changed the local systems of measurement to adhere to this. After the fall of the Roman Empire, the British came up with their own system of measurement. In their system, they used a 'furlong', which was the distance a horse could travel pulling a plow before stopping for rest, to measure distances. 1 furlong was equal to about 660 feet, making the mile 8 furlongs. These and other similar methods led to a varied measurement of the mile. This was solved, to some extent, with the adoption of the international yard and pound measurements, which were agreed upon by 6 countries, which included the United States, United Kingdom, Canada, Australia, New Zealand, and South Africa. In this agreement, 1 yard was exactly 0.9144 meters. With this agreed unit of measurement, the mile came to be 1,609.344 meters, and was known as the 'International Mile'. There were exactly 1760 yards in a mile using this system. While the US follows the International Mile, they also use the US Survey Mile or the Statute Mile, which measures 1,609.347219 meters, or about 3.2 mm longer than the International Mile. The statute mile, so termed as it was defined by an English Act of Parliament, is another measurement of the mile. The statute, which was during the time of Queen Elizabeth I, states: "A Mile shall contain eight Furlongs, every Furlong forty Poles, and every Pole shall contain sixteen Foot and an half." (35 Eliz. Cap. 6.). This also works out to be about 1760 yards, 5280 feet, or 1609 meters. Besides these, there is the Metric Mile, which is used in sporting events where distance is to be measured, like track and field events. 1 Metric Mile is equal to 1500 meters. The Nautical Mile is a measurement used in sea and air travel, and is defined as 'one minute of arc measured along any meridian'. 1 International Nautical Mile is measured at exactly 1,852 meters or 6,076.12 feet.