What doctrines were put forward in the United States for the implementation of the foreign policy course

What doctrines were put forward in the United States for the implementation of the foreign policy course, to what extent, in your opinion, have they been successfully implemented?

For a long time, the United States of America has been putting forward a doctrine according to which it protects the interests of its own citizens anywhere in the world and at the same time defends the principles of democracy throughout the world. Based on this doctrine, they repeatedly interfered in internal affairs in Latin America and the Middle East. To some extent, the Americans managed to achieve positive results for themselves, but in many military conflicts in which they entered, they did not win an unconditional victory.