4 апр 1949 г. - Nato

Описание:

The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance between 29 North American and European countries. The organization implements the North Atlantic Treaty that was signed on 4 April 1949.
(https://www.google.com/search?safe=active&sxsrf=ACYBGNS3nIC2VjQ4R-Tv5Z04zZeoc-2JZQ%3A1571873425873&ei=keKwXa7wNKS-ggfak4vYCg&q=nato+established&oq=nato+established&gs_l=psy-ab.3..0i70i251j0l3j0i22i30l6.32833.36768..36854...0.5..0.421.3482.0j7j5j2j1....2..0....1..gws-wiz.......0i71j0i67j0i131.st95yaz8LMg&ved=0ahUKEwju_LjpxLPlAhUkn-AKHdrJAqsQ4dUDCAo&uact=5)