Why did the Reagan doctrine involve the US in foreign lands?

The Reagan Doctrine was a foreign policy strategy aimed at countering the influence of the Soviet Union during the Cold War by supporting anti-communist movements worldwide. It involved the U.S. providing military and financial assistance to insurgent groups and governments resisting communist rule. This approach was based on the belief that a proactive stance against communism was necessary to promote democracy and protect U.S. interests globally. As a result, the U.S. became involved in various conflicts, including those in Afghanistan, Nicaragua, and Angola.