The National Guard of the United States is the oldest component of the Armed
Forces and one of the nation’s longest-enduring institutions. Its roots are traced
back to October 7, 1636 during the formation of the Militia of the Massachusetts
Bay Colony.
 

The National Guard of the Island of Guam can be traced back to the first military
organization on the island known as the Guam Militia. The Guam Militia was first organized by Governor Mariano Tobias during the Spanish colonial period on Guam in 1771 but was disbanded in 1885. It was later reestablished on March 25, 1917, under U.S. Naval Governor Roy C. Smith because island residents requested more physical and military training be required of their younger male population. Thus, it became mandatory for males, 18 years or older, to attend drills on Sundays from 8 a.m. to 11:30 pm. at the Plaza de Espana in Hagatna. As a quasi-military force, the unit members were neither compensated nor
provided with uniforms and equipment. The Guam Militia grew to as many as 1,750 members, consisting of 77 officers and 1,674 enlisted men, by March 1, 1935 and was later reorganized into a voluntary military force.
 

On December 10, 1941, U.S. Naval Governor Captain C.J. McMillin conceded to the Imperial Japanese Army who forced the Militia to become inactive; however, it was never disbanded. During the Japanese occupation of Guam, the Imperial Japanese Forces subjected the island natives, Chamorros, to death, torture and enslavement over the next two and a half years.
 

The U.S. Marines’ invasion of Guam on July 21, 1944 liberated the Chamorro
people and returned full ownership of the island to the United States. Guam is the
only U.S. possession, with a sizable population, to ever be controlled by a foreign
government for a significant period of time.
 

By December 11, 1950, Governor Carlton Skinner had the Guam Militia reconstituted as a voluntary force commanded by Colonel Juan Muna, whose name is still used to day for the Guard’s main headquarters, Fort Juan Muna. Militiamen Tomas R. Santos and Joaquin Charfauros, members of the original pre-World War II Guam Militia, were appointed as honorary Generals of the Guam National Guard. The Guam Militia was legally deactivated in 1956 after the 4th Guam Legislature passed Public Law 23 to provide the necessary basis toward establishing a National Guard for the island of Guam. Congressman Antonio A.B. Won Pat and Governor Ricardo J. Bordallo made significant contributions to the Guam Guard through their negotiations with the U.S. Congress and the National Guard Bureau to establish a Guard structure for Guam.

On December 24, 1980, President Jimmy Carter signed Public Law 96-600 introduced by the 96th Congress officially authorizing the establishment of the Guam National Guard. Governor Paul M. Calvo served as the first Commander-In- Chief and Brigadier General Robert H. Neitz was appointed as the first Adjutant General for the nation’s youngest member to the National Guard family. On July 21, 1981, the Guam National Guard’s Command headquarters was officially established with 32 original charter members. The organization’s personnel strength has grown to over 1,500 members between its Army and Air Guard commands.