The U.S. Armed Forces has used the Social Security number as an identification number for the Army and Air Force since July 1, 1969, the Navy and Marine Corps since January 1, 1972, and the Coast Guard since October 1, 1974. Previously, the United States military used a much more complicated system of service numbers.
| Share | Cite. Cameroon (kÄmËÉrÅnË) [ key ], Fr. Cameroun, officially Republic of Cameroon, republic (2005 est. pop. 16,380,000), 183,568 sq mi (475,442 sq km), W central Africa.
Plants. Gobi Desert plants offer a different set of wonders. For one example, the fruit and maple trees of the Tian Shan Range are remnant species of a deciduous forest that flourished in the region during the Tertiary, a geologic period that lasted from about 65 to some 2 million years ago.