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Years of the 20th century in the United States (101 C, 100 P) Pages in category "20th century in the United States" The following 31 pages are in this category, out of 31 total.
too small to map: December 8, 1915 The United States expropriated from Panama a triangle of land, which included the historic Fort San Lorenzo, between the Rio Chagres, Caribbean Sea and the Panama Canal Zone, to which it was annexed. [367] January 17, 1916 Navassa Island was formally claimed for lighthouse purposes. [368] no change to map ...
Years of the 20th century in the United States by state or territory (156 C) A. ... 20th century in the Northern Mariana Islands (11 C) O. 20th century in Ohio (19 C)
Years of the 20th century in the Northern Mariana Islands (29 C) O. Years of the 20th century in Ohio (100 C) Years of the 20th century in Oklahoma (106 C)
The 20th century in the United States refers to the period in the United States from 1901 through 2000 in the Gregorian calendar. For information on this period, see: History of the United States series: History of the United States (1865–1918) History of the United States (1918–1945) History of the United States (1945–1964)
20th century in North America by city (30 C) 20th-century crimes in North America (24 C, 1 P) ... 20th century in the British Virgin Islands (8 C) C.
1930s in North America by city (3 C) 1940s in North America by city (3 C) ... 20th century in Panama City (12 P) 20th century in Port of Spain (3 P)
Then it sent surveyors to map and document the land. [68] By the 20th century, Washington bureaucracies managed the federal lands such as the United States General Land Office in the Interior Department, [69] and after 1891, the Forest Service in the Department of Agriculture. [70] After 1900, dam building and flood control became major ...