In the post-World War II era, United States foreign policy has primarily involved the following two approaches:
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It has formed international coalitions when the use of military force is necessary. - The U.S. has often worked with allies and international organizations to address conflicts, as seen in NATO operations and coalitions formed for military interventions in various conflicts.
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It has often acted on its own when the use of military force is necessary. - There have been numerous instances where the U.S. has undertaken military action unilaterally or without broad international support, such as in Iraq in 2003.
These two points capture the dual nature of U.S. foreign policy, balancing multilateral approaches with unilateral actions in the international arena.