Talk:List of equipment used by the enemy/@comment-137.132.3.8-20140417143734/@comment-26872367-20150821161842

Technically, since 1893, the US has been on a variant of the metric system, when the Mendenhall Order changed the definition of all US customary units from being based on the British Imperial Standard Unit exemplars to being based on the Metric standard unit exemplars, with precise fractional lengths relative to the metric units used to have the minimum actual change. Thus, since 1893, the US inch has been defined as PRECISELY 25.40000 millimeters...