A bill to amend title 10, United States Code, to modify the organization and authorities of the Assistant Secretaries of Defense with duties relating to industrial base policy and homeland defense.

This bill reorganizes key defense leadership roles within the Department of Defense. It creates a new "Assistant Secretary of Defense for International Industrial Base Development and Engagement" to strengthen U.S. defense manufacturing through cooperation with allies (including Taiwan), reporting directly to the Under Secretary of Defense for Acquisition. It renames the existing "Strategy, Plans, and Capabilities" position to explicitly include "Homeland Defense" responsibilities, adding oversight for homeland defense policy, civil support, and Arctic resilience. The bill also eliminates the separate "Homeland Defense and Hemispheric Affairs" position and expands the International Security Affairs role to cover Western Hemisphere affairs. These changes directly affect the Department of Defense's internal structure and reporting lines.