Final answer:
Power projection is the capability to deploy and sustain military forces globally in support of national strategy, involving the use of diplomatic, economic, and military resources to influence global events and maintain a country's influence worldwide.
Step-by-step explanation:
The capability to deploy and sustain military forces globally in support of a country's national strategy is known as power projection. This involves establishing a presence in various parts of the world, potentially through military installations and bases, to support diplomatic and strategic goals. Power projection enables a country to influence global events and politics, often by showing a readiness to use military force if necessary. It is a key aspect of a nation’s grand strategy, which includes using all resources—diplomatic, economic, and military—to advance national interests.
Examples of power projection can be seen in the history of the United States' foreign policy post-World War II, with the establishment of military bases in Europe and Asia. This strategy not only aided in stabilizing these regions but also ensured the extension of U.S. influence worldwide. The concept of Flexible Response from the Kennedy era also ties into power projection, as it focuses on building conventional forces that can deploy rapidly around the world.