Containment is a geopolitical strategic foreign policy pursued by the United States. It is loosely related to the term cordon sanitaire which was later used to describe the geopolitical containment of the Soviet Union in the 1940s. The strategy of "containment" is best known as a Cold War foreign policy of the United States and its allies to prevent the spread of communism after the end of World War II.
Based on history, Spain and Portugal were the first one to colonize the nearby country making the country expand on its territory. Meanwhile, Portugal mainly focusing on the trades and economy of its country. In contrary to this, Spain got an idea to find spices from nearby country since it was at that time has a greater value.But, It is the Spain send missionaries and friars to nearby country to Christianize those native people.
What was the Open Door policy? The Open Door policy was a statement of principles initiated by the United States in 1899 and 1900. It called for protection of equal privileges for all countries trading with China and for the support of Chinese territorial and administrative integrity.
