How did the U.S. become in the politics of Southeast Asia?

http://encarta.msn.com/encyclopedia_761552642/Vietnam_War.html

http://en.wikipedia.org/wiki/Philippine-American_War

The involvement of the United States in the politics of Southeast Asia can be traced back to the mid-19th century. To understand how this came about, we need to explore the historical context and key events that shaped U.S. involvement in the region.

1. Gaining territorial acquisitions: During the 19th century, the U.S. pursued territorial expansion, leading to the acquisition of new territories in Asia and the Pacific. The Spanish-American War in 1898 resulted in the U.S. gaining control of the Philippines, Guam, and Puerto Rico, expanding its influence in the region.

2. Economic interests: The U.S. developed economic interests in Southeast Asia, particularly in trade and natural resources. The region offered valuable commodities like rubber, tin, and oil, which spurred American business interests and investment.

3. World War II and the Cold War: World War II played a crucial role in reshaping the power dynamics in Southeast Asia. Japan occupied a significant part of the region during the war, leading to a weakening of European colonial powers. After the war, the U.S. emerged as a dominant global power, aiming to contain the spread of communism during the Cold War era.

4. Containment policy: The U.S. adopted the "containment" policy to prevent the spread of communism, which guided its foreign policy decisions in Southeast Asia. This policy was prompted by the fear that the spread of communism, as seen in China and later in North Korea, could threaten U.S. interests and stability in the region.

5. French Indochina and Vietnam: Following WWII, France sought to reassert its control over its former colony of Indochina (Vietnam, Laos, and Cambodia). The U.S. provided financial and military support to France in its war against Vietnamese communist forces led by Ho Chi Minh. However, the French were eventually defeated at the Battle of Dien Bien Phu in 1954, leading to the division of Vietnam and U.S. involvement escalating into what would become the Vietnam War.

6. Domino theory: The Domino Theory was a key influence on U.S. involvement in Southeast Asia. It suggested that if one country fell to communism, neighboring countries would also fall, like a row of dominoes. This theory further motivated the U.S. to support anti-communist governments and military interventions to prevent the spread of communism in the region.

In summary, U.S. involvement in Southeast Asia was driven by a combination of factors including territorial expansion, economic interests, anti-communist ideology, and global power dynamics during the Cold War. This involvement had a lasting impact on the region and played a significant role in shaping the political landscape of Southeast Asia.