The United States was one of the original signatories of the Metre Convention [1]. The metric system has been the foundation of all US measures since 1893 [2,3

The United States was one of the original signatories of the Metre Convention [1]. The metric system has been the foundation of all US measures since 1893 [2,3]. School children in the United States have learned both systems for decades. Ford trucks have metric bolts. The US military uses the metric system. [1]: https://en.wikipedia.org/wiki/Metrication_in_the_United_States https://en.wikipedia.org/wiki/Metrication_in_the_United_Stat... [2]: https://en.wikipedia.org/wiki/United_States_customary_units https://en.wikipedia.org/wiki/United_States_customary_units [3]: https://en.wikipedia.org/wiki/Mendenhall_Order https://en.wikipedia.org/wiki/Mendenhall_Order