The Mexican Armed Forces consist of the Mexican Army, Mexican Navy, and Mexican Air Force. They are responsible for defending the country against external threats and maintaining internal security. The military also plays a role in disaster relief and humanitarian assistance during emergencies. The Mexican Army is the largest branch, focusing on land operations, while the Mexican Navy oversees maritime security and naval operations. The Mexican Air Force provides aerial support and surveillance. Together, these branches work under the authority of the Secretary of National Defense and the Secretary of the Navy.