Nato And The Warsaw Pact

Nato and the warsaw pact started really small in a group and expanded sometime in the late 1940's and it probably started with like 8 or 9 countrys and it started to grow over time. Nato happened to grow and then Nato was a big group that was made up by most of Europe and North America and one of the biggest reason why Nato was formed was because the countrys that was involved wanted to have mutal defense alliance. So that if at anytime one of the countrys that was part of the Nato then all the other countrys where forced to come to the rescue. The Warsaw Pact
was mostly consisted by the Soviet Union and its satellite countrys and the reason for its making was because it was supose to be another mutual defense alliances like the north atlantic treaty.