NATO (North Atlantic Treaty Organization) was formed to create a world ally. Canada was involved. In 1949 NATO was designed so that if an armed attack occured against one or more of the countries in NATO then it should be considered an attack against them all. Some countries involved were Belgium, Canada, Denmark, France, Iceland, Italy. ALso, in 1949 the USSR exploded an atomic bomb and became a 2nd nuclear power on a global scale.