The Rancho Santa Margarita y Las Flores was the largest in California, over 200 square miles, and originally belonged to the family of Pio Pico, changing hands until the Marine Corps takeover.
Unlike Camp Lejeune, constructed to permanent specifications of brick, steel, and concrete, CampPendleton, considered a temporary facility, was built to minimum standards of wood-frame construction.
CampPendleton was officially dedicated on September 25, 1942 with President Franklin D. Roosevelt in attendance.
In the mid-1980s, the airfield was modernized with permanent structures resulting in the commissioning of MCAS CampPendleton on March 24, 1987.
CampPendleton provides training facilities for many active-duty and reserve Marines, Army and Navy units, as well as national, state and local agencies.
Pendleton Marines are environmentally conscientious as they share the land with nearly 400 species of mammals and birds.
CampPendleton is proud of its colorful heritage and has been careful to preserve the past, as reflected in the home of the I Marine Expeditionary Force's commanding general, which is now a National Historic Site.