This legislation, known as the "Department of Defense's Cost of `War` Act of 2025" , establishes a funding mechanism for the potential renaming of the Department of Defense to the "Department of War" . It specifies that all associated costs, including changes to physical signage, websites, and media, must be paid by reallocating existing funds. Specifically, the bill mandates that the Secretary of Defense first use amounts from their travel budget to cover these expenses. Should those funds prove insufficient, the remaining costs would then be drawn from the travel budgets of the secretaries of the military departments. Furthermore, the Secretary is required to submit a report to Congress within one year detailing the total amount obligated or expended for these renaming costs.