Joint service unit in the United States armed forces
Members of the 1st JASCO on Saipan, 1944
A joint assault signal company (JASCO) was a joint service unit that provided ship to shore and air to ground communications to coordinate and control naval gunfire and close air support for American land forces during World War II. They were composed of specially trained officers and enlisted personnel from the Navy, Marines, and Army. The Army component was composed of Air Liaison Officers (modern day Forward Air Controllers) and enlisted communications technicians. JASCOs were created in the Pacific because previous small communication teams were ineffective and only served to clutter communications. After the costly Battle of Tarawa, the need for centralized command and control of air and naval fire support between the Navy, Marines, and Army was seen. Major General Alexander Vandegrift formed the Joint Assault Signal Companies based on his experiences in the Guadalcanal campaign.[1] Navajo and other Native American code talkers were often attached to JASCOs.[2][3]
^Cite error: The named reference The Signal Corps was invoked but never defined (see the help page).
^"Joint Assault Signal Company". Archived from the original on 7 February 2017. Retrieved 5 January 2019.
^"4th Marine Division Report Tinian 24 July to 1 Aug 1944" (PDF). Archived (PDF) from the original on 7 July 2021.
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