Camp Lawrence J. Hearn was a United States Army facility formerly located in Palm City, San Diego, California.

Marshall visited the post just before he died in a plane crash while traveling to Tucson, Arizona.

[7] Until 1921 the post consisted of a tent cantonment with no permanent structures and soldiers requiring medical care would be sent to Fort Rosecrans for treatment.

Army Chief of Staff Major General Summerall described them as being like a "logging camp" composed of "tumbledown shacks".

[10] In 1924, cavalrymen from the post assisted local officers and federal agents in enforcing a 9 pm curfew at the international border crossing.