Which State Department bureau provides the principal link to the DoD on international acquisition matters?

Bureau of Political-Military Affairs

Explanation:

In simple words, The Department of political-Military Affairs is an entity of the Department of State of the United States that connects the Department of State to the department of homeland security.

As per the homepage of the state department, the agency provides access to the army facility and airspace authorisation to promote the implementation of U.s. forces. It cooperates the position of U.S. armed powers and – anti-surrender provisions including its International Criminal Court. This is also accountable for monitoring the involvement of international fighting and stabilisation forces.

is there a year set? the question is incomplete

answer; ///approx///5,000 miles;