Foreign policy, also known as external policy, is the set of strategies and actions a state employs in its interactions with other states, unions, and international entities. It encompasses a wide range of objectives, including defense and security, economic benefits, and humanitarian assistance. The formulation of foreign policy is influenced by various factors such as domestic considerations, the behavior of other states, and geopolitical strategies. Historically, the practice of foreign policy has evolved from managing short-term crises to addressing long-term international relations, with diplomatic corps playing a crucial role in its development.