500 Varas Square-Government Reserve

About this property

Fort MacArthur is a former United States Army installation in San Pedro, Los Angeles, California (now the port community of Los Angeles). A small section remains in military use by the United States Air Force as a housing and administrative annex of Los Angeles Air Force Base. The fort is named after Lieutenant General Arthur MacArthur. His son, Douglas MacArthur, would later command American forces in the Pacific during World War II. In 1888, President Grover Cleveland designated an area overlooking San Pedro Bay as an unnamed military reservation intended to improve the defenses of the expanding Los Angeles harbor area. Additional land was purchased in 1897 and 1910, and Fort MacArthur was formally created on October 31, 1914. The fort was a training center during World War I, and the first large gun batteries for harbor defense were installed in 1917. The effectiveness of these fixed gun emplacements was debated for many years, and test firings were extremely unpopular with nearby residents, the concussion shattering windows in buildings and houses for miles around. In the period between the wars, Fort MacArthur was used as a Citizens' Military Training Camp beginning in 1926 and also by companies of the Civilian Conservation Corps. In World War II, Fort MacArthur had a Harbor Entrance Command Post and a Harbor Defense Command Post for US seacoast defense of shipbuilding factories (e.g., CalShip, Todd Pacific), "giant aircraft factories" (Douglas, Hughes, Martin, Northrop), the Huntington Beach Oil Field, and the San Pedro Bay harbor (Port of Los Angeles & Port of Long Beach) which made the Los Angeles metropolitan area a target for attack. By the end of World War II the large guns were already being removed, with the last decommissioned in 1948. Battery Osgood-Farley is probably the best preserved example of a United States coastal defense gun emplacement, and it was placed on the National Register of Historic Places in 1976. A second site, Battery John Barlow and Saxton, was added to the Register in 1982. During the early years of the Cold War, Fort MacArthur became a key part of the West Coast's anti-aircraft defenses, becoming the home base of the 47th Anti-Aircraft Artillery Brigade. A Nike surface-to-air missile battery was activated at the fort in 1954, remaining in service until the early 1970s. The Fort MacArthur Direction Center (DC) was the U.S. Army Air Defense Command Post (AADCP) for the Project Nike batteries of the Los Angeles Defense Area. It was located at Fort MacArthur from 1960. The Direction Center provided radar coverage for integrating the area's Integrated Fire Control (IFC) sites (16 sites for MIM-14 Nike-Hercules missiles until 1968). The DC had High Frequency Crosstell communication with the 1959–1966 Semi-Automatic Ground Environment (SAGE) Master Direction Center at Norton Air Force Base (DC-17) for coordinating Army intercepts of targets penetrating through the larger USAF Los Angeles Air Defense Sector defended by fighter aircraft.

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Property data from the National Register of Historic Places, National Park Service (public domain).

Description adapted from Wikipedia under the Creative Commons Attribution-ShareAlike 4.0 International License.

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