The five conflicts that show the most common action of the real reason why we invaded are: World War Two, the Cold War, Korean War, Vietnam, and Operation Iraq. Some of the foreign policies that fit these wars are: the Kellog-Braind Act, Yalta Conference, Cold War Containment Policy, and the SALT Treaties.
When the conclusion of the Great War came to an end, the first signs of the iron grip of the United States were shown, and because of this many treaties and policies were drafted to try and prevent any other wars. One of the not so evident policies was the Kellog-Briand Pact; it stated "Persuaded that the time has, come when a frank renunciation of war as an instrument of national policy should be made to the end that the peaceful and friendly relations now existing between their peoples may be perpetuated" (Kelogg-Briand Pact, 1928). The Kellogg-Briand Pact, had ideals that were the most ludicrous ideas ever, in short it said lets not fight and we can solve little problems by talking over a cup of tea. I interpret this pact much like the proverbial bully and the milk money fiasco were the bully hits kid for milk money and then the bully is punished but we all know the whiny kid will get his for telling on the bully. When this pact was put into action right away something was going to go wrong such as Adolph Hitler gains power in 1933, Joseph Stalin begins his Reign, and Mussolini rises from the ashes of Italy's economic depression. I believe this is a big pact when it comes to the United States and the flexing of the "Democratic" muscles, because it is shown in all wars after, not just by the evil countries but also by the one trying to save Democracy. Every war after the Kelogg-Briand Pact was put into action was started because of the direct opposite ideal the pact was striving for. By stopping the countries that did not have a Democratic Government one must take force to push that government behind that curtain, thus becoming a complete hypocritical statement to what the United States signed on August 37, 1928, but without force how could we have denied the freedom of so many people that we have taken over.