The 1970s marked the start of a new shift in the nature of the designations. Of the 473 National Historic Sites designated between 1971 and 1993, the formerly dominant category of political-military events represented only 12 percent of the new designations, with the "Battle of..."-type commemorations being overtaken by sites associated with federal politics. The largest group of designations (43 percent) pertained to historic buildings. By the 1990s, three groups were identified as being underrepresented among National Historic Sites: Aboriginal peoples, women, and ethnic groups other than the French and the English. Efforts were subsequently made to further diversify the designations accordingly. Saoyú-ʔehdacho in the Northwest Territories was designated in 1997, becoming the first National Historic Site both designated and acquired on the basis of consultation with Aboriginal peoples, and the largest National Historic Site in land area (approximately the size of Prince Edward Island). It was at this time that the use of the term "National Historic Park", then still used for the class of larger National Historic Sites operated by Parks Canada and deemed to be of "extraordinary value to Canadian history", was phased out.