Military - As introduced, prohibits the Tennessee national guard, or a member of the national guard, from being released from state duty into federal active duty combat unless the United States congress has passed an official declaration of war or has taken an official action pursuant to Article 1, Section 8, Clause 15, of the United States Constitution to explicitly call forth the Tennessee national guard or a member of the national guard for the enumerated purposes to expressly execute the laws of the union, repel an invasion, or suppress an insurrection. - Amends TCA Title 58, Chapter 1.

HB 129 prevents Tennessee National Guard members from being deployed to federal active combat duty without specific congressional authorization. It requires Congress to either declare war or take action under the Constitution's Article I, Section 8, Clause 15 (for executing laws, repelling invasion, or suppressing insurrection) before the state can release guardsmen for combat. The bill does not affect domestic missions under Title 32 of federal law, which allows deployments for civil support within the U.S. The governor must ensure compliance with this requirement, directly impacting Tennessee Guard members and state military operations.