Puerto Rico National Guard The Puerto Rico National Guard ( ) is a component of the United States National Guard in the U . S . Territory of Puerto Rico . It comprises both Army and Air National Guard components with a total authorized strength of 10 , 000 soldiers and airmen . The Constitution of the United States specifically charges the National Guard with dual federal and state missions . The National Guard is the only United States military force empowered to function in a state status . Those functions range from limited actions during non - emergency situations to full - scale law enforcement of martial law when local law enforcement officials can no longer maintain civil control . The National Guard may be called into federal service in response to a call by the President or , usually at the request of the governor of the state . When under state / Territory control , the Governor serves as Commander - In - Chief . When National Guard troops are called to federal service , the President serves as Commander - In - Chief . The federal mission assigned to the National Guard is : " To provide properly trained and equipped units for prompt mobilization for war , National emergency or as otherwise needed . " The Governor of Puerto Rico may call individuals or units of the Puerto Rico National Guard into state service during emergencies or to assist in special situations in which National Guard use is appropriate . The state mission assigned to the National Guard is : " To provide trained and disciplined forces for domestic emergencies or as otherwise provided by state law . " History . After the Spanish American War in 1898 , Spain ceded Puerto Rico to the United States . US military authorities discussed Puerto Rico ' s military value . It offered tremendous commercial value in expanding commerce among the US , Central and South America . Because of the political changes in the beginning of the 20th century , the strategic military importance of Puerto Rico grew . In 1906 , a group of Puerto Ricans met with the Governor Winthrop , and the Commissioner of Interior , Lawrence H . Graham , to organize a National Guard of Puerto Rico . The public supported this effort and some companies were organized , in different towns around the island : Yauco under the command of Captain Santiago Vivaldi ; Juana Díaz , commanded by Captain Diaz - Brik ; Peñuelas by Captain Gabino Balasquide ; and two in Ponce by Pedro Juan Armstrong , Mario Belaval , J . Oppenheimer , F . del Valle and Doctor Laguna . In San Juan three companies were organized under Federico Vall - Spinosa , Justo Barros , J . del Barril , R . Swigett , J . Doere , Lugo Vinas and F . Fano . As the companies were being formed , all of the officers and soldiers had to purchase their own uniforms and supplies , since there was no government funding for the enterprise . This organization failed due to existing U . S . federal law , which prohibited the formation of any armed force within the United States and its territories without authorization from Congress . During World War I , Puerto Ricans served in the 373d , 374th , and 375th Infantry Regiments of the National Army and the Puerto Rican Regiment of the Regular Army . Approximately 20 , 000 troops were trained at Camp Las Casas . The young Puerto Rican officer , Luis Raúl Estevez , thought a Puerto Rican National Guard was needed . As the first Puerto Rican to graduate from the US Military Academy at West Point , he had learned about military units in other states . He discussed the issue with the governor of Puerto Rico , Arthur Yager , soon after the conclusion of World War I . The governor , Legislature of Puerto Rico , and US Congress approved the plan , and the National Guard was organized in 1919 . In 1938 , Luis R . Esteves was promoted to Major General and appointed as Adjutant General of the Puerto Rican National Guard . The first regiment of the Puerto Rico National Guard , " First Infantry Regiment " , was organized on June 2 , 1920 and reorganized on December 26 , 1922 , as the 295th Infantry Regiment . On March 1 , 1936 , the 296th Infantry Regiment was organized . Before , the 296th existed as a battalion of the 295th Infantry Regiment . On October 30 , 1950 , the Puerto Rican Nationalist Party organized a series of uprisings in numerous cities in Puerto Rico against United States rule and the Puerto Rican commonwealth government in what is known as the Puerto Rican Nationalist Party Revolts of the 1950s . The Puerto Rico National Guard was mobilized under the command of Puerto Rico Adjutant General Luis R . Esteves by orders of Governor Luis Muñoz Marín and sent to confront the Nationalists in various towns such as Jayuya , Utuado and San Juan . Adjutant General . The Adjutant General is the Executive Officer and Commander of both the Puerto Rico National Guard and the Puerto Rico State Guard . Governor Luis Fortuño appointed Major General Antonio J . Vicens as the 20th Adjutant General of the Puerto Rico National Guard on January 2 , 2009 . He holds a B . B . A - Management Degree from the University of Puerto Rico .