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Project DELTA

US Reconnaissance Project formed during the Vietnam War

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 22, 2026
Entity authorityQ6089148
Source-derived summary

Project DELTA was the first of the Reconnaissance Projects, which were special reconnaissance (SR) units named with a Greek letter. The Reconnaissance Projects were originally formed by the U.S. Mission as Project Leaping Lena and one month later transferred to Military Assistance Command, Vietnam (MACV) during the Vietnam War to collect operational intelligence in remote areas of South Vietnam.

Project DELTA was established at Nha Trang in 1964 and consisted of six reconnaissance hunter-killer teams each composed of four United States Special Forces (USSF) and six Army of the Republic of Vietnam Special Forces (LLDB) and later supported by the 91st Ranger Battalion (later redesignated the 81st Ranger Battalion). It was designated Detachment B-52, 5th Special Forces Group.

Mission

DELTA's mission included operational and strategic reconnaissance into long-held Viet Cong areas and the direction of air strikes on them. They were also to conduct bomb damage assessment, conduct small scale reconnaissance and hunter-killer operations, capture and interrogate VC / NVA, tap communications, bug compounds and offices, rescue downed aircrew and prisoners of war, emplace point minefields and other booby traps, conduct psychological operations, and perform counter-intelligence operations. They were to focus on base areas and infiltration routes in the border areas.

History

DELTA originated as LEAPING LENA which was established on 15 May 1964 in order for the USSF to train LLDB teams for missions in South Vietnam. During LEAPING LENA, five teams of eight LLDB soldiers were parachuted into Laos but only five men survived the experience. The US did not participate.

Editorial summary

The public source identifies “Project DELTA” as uS Reconnaissance Project formed during the Vietnam War. This brief keeps that definition visible, then builds a research path around Project, DELTA and Reconnaissance.

Editorial reviewA strong contextual entry point for chronology, institutions and public events when official records are distinguished from later interpretation. The current lead gives the account dated anchors—1964—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Project, DELTA and Reconnaissance providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Project DELTA”, the useful work is to connect “uS Reconnaissance Project formed during the Vietnam War” to the records capable of establishing context and consequence.

Evidence profile

Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Jun 22, 2026. The linked authority identifier is Q6089148. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1964.

Critical limits

Later summaries often reconcile disputed chronology or motive more neatly than the contemporary record permits. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Contemporary correspondence, government or organizational records, oral histories and cited historical scholarship.

Three-step research path

  1. Establish the record: confirm the title “Project DELTA”, its source revision and the description used here.
  2. Expand the search: follow Project DELTA primary sources, Project DELTA archive and Project research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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Source & attribution

This entry incorporates text from Project DELTA” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.