Camp Las Casas was a United States military installation established in Santurce, Puerto Rico in 1904.

After the Spanish–American War ended, Puerto Rico was annexed by the United States as a result of the Treaty of Paris of 1898, ratified on December 10, 1898.

Spain had lost its last colony in the western hemisphere and the United States gained imperial strength and global presence.

"[1] The Army Appropriation Bill created by an Act of Congress On March 2, 1889, authorized the creation of the first body of native troops in Puerto Rico.

On July 1, 1901, the United States Senate passed a Bill which would require a strict mental and physical examination for those who wanted to join the Regiment.

34, War Department, July 29, 1904, the recruitment of native Puerto Rican civilians to be appointed the grade of second lieutenants for a term of four years, was approved with the condition that they pass the required tests.

Sergeant Encarnacion Correa then manned a machine gun which was located along the wall below La Fortaleza, the governor's residence and fired warning shots at the ship with little effect.

[3] Marxuach then fired a shot from a cannon located at the Santa Rosa battery in the upper platform of El Morro, in what is considered to be the first shot of World War I fired by the regular armed forces of the United States against any ship flying the colors of the Central Powers,[4] and it forced the Odenwald to stop and to return to port, where its supplies were confiscated.

In 1916, the military strength of the Porto Rico Regiment increased with the creation of machine gun and supply companies and the organization of a 3rd battalion.

[2] On January 30, 1917, Puerto Ricans Manuel B. Navas, Enrique M. Benitez, Vicente N. Diaz, Andres Lopez, Ramon S Torres, Modesto E. Rodriuez and Ernesto F. Colon were appointed to serve as Second Lieutenants of the Porto Rico Regiment.

[19] Those who were assigned to the 295th and 296th regiments of the Puerto Rico National Guard received their training at Camp Tortuguero, near the town of Vega Baja.

[20] In January 1944, the Regiment was embarked for Jackson Barracks in New Orleans and later sent to Fort Eustis in Newport News, Virginia in preparation for overseas deployment to North Africa.

Arriving at Puerto Rico on November 9, 1945, they were received by the local population as national heroes and given a victorious reception at the Military Terminal of Camp Buchanan.

Among the notable people whose actions at one time or another have been linked to Camp Las Casa were the following: [27] Other military articles related to Puerto Rico: