The Department of State is

 The US Department of State functions as the diplomatic wing of the federal government, handling matters of foreign affairs with other nations and international bodies. The State Department's primary job is to promote American foreign policy throughout the world.

  The United States Department of State (DOS), commonly referred to as the State Department, is a federal executive department responsible for carrying out U.S. foreign policy and international relations.

Explanation:

wait history, who want to talk about history, boring.

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