Coup Atlas Research Database
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73204271960SuccessfulPopular revolt

Republic of Korea, 1960 — popular revolt

Republic of Korea (KOR)East Asia, AsiaApril 27, 1960

Event Summary

In April 1960, mass student-led protests known as the April Revolution forced South Korea's authoritarian president Syngman Rhee to resign, ending the First Republic. Rhee, in power since 1948, had grown increasingly repressive, and the March 15, 1960 elections were blatantly rigged to secure the vice presidency for his ally Lee Ki-poong. Protests erupted in the port city of Masan, and the discovery in early April of the body of a student killed by police tear gas ignited nationwide outrage.

On April 19, huge demonstrations in Seoul were met with police gunfire that killed scores; over the two weeks of protest about 186 people died. When the army declined to fire on the crowds and the United States pressed for reform, Rhee announced his resignation on April 26. He soon went into exile in Hawaii, where he died in 1965.

An interim government drafted a new constitution and held fresh elections, inaugurating the short-lived Second Republic.

Researched Details

Researched

Independent research, added record by record. Hover any label for what it means.

Target identified in Coup Atlas research: Syngman Rhee, President of South Korea (forced to resign by popular revolt, exiled to Hawaii)
RESEARCHED NAME
Key figures
Syngman Rhee (deposed president)
Lee Ki-poong (ally whose rigged election triggered protests)
Song Yo-chan (martial law commander who declined to fire on protesters)

Sources

The April Revolution was mass protests against President Syngman Rhee from 11 to 26 April 1960; Rhee resigned on 26 April before fleeing to exile in the United States and was replaced by Yun Posun, beginning the transition to the Second Republic, with 186 people killed during the two weeks of protest.
SOURCE REVIEWED Wikipedia, "April Revolution" open source ↗
On 26 April 1960 President Rhee issued his formal resignation and went into exile in Hawaii, after the martial law command declined to fire on demonstrators and the United States pressed for his resignation; new elections in July brought the opposition Democratic Party to power.
SOURCE REVIEWED Global Nonviolent Action Database, "South Korean students force dictator to resign, 1960" open source ↗
The March 1960 election was heavily rigged in favor of Rhee's running mate Lee Ki-poong, and allegations of manipulation sparked protests that spiraled into the April Revolution, causing the annulment of the election and the resignation and exile of Rhee.
SOURCE REVIEWED Wikipedia, "March 1960 South Korean presidential election" open source ↗
Rhee stepped down on 26 April 1960 and was flown out of South Korea, dying in exile in Honolulu in 1965; the protests had grown as professors and other citizens joined the students.
SOURCE REVIEWED Association for Diplomatic Studies and Training, "The Fall of South Korean Strongman Syngman Rhee" open source ↗

Editorial Note

The Cline dataset codes 27 April 1960 with the leader exiled; sources place Rhee's resignation on 26 April, with his departure for Hawaii in late May, so the dataset date is a day after the resignation. The leader fate of exile matches. Two Wikipedia articles, the Global Nonviolent Action Database, and ADST were read directly. This popular revolt ended Rhee's First Republic and led to the brief Second Republic, itself ended by a 1961 military coup.

Cross-Reference

Only one dataset carries it. One of the three reference datasets we check against carries this event; the others do not list it. That is not a contradiction — the datasets cover different periods and use different thresholds — but it means the record has had less outside corroboration.

Identifiers for finding this same event in the other datasets:

Cline Center id
73204271960

How the match is made is described in crossref-report.md.

Outcome and Target

Coup Atlas research identifies the target as: Syngman Rhee, President of South Korea (forced to resign by popular revolt, exiled to Hawaii).

Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; exiled. The baseline file does not name individual targets; researched names are kept in a separate layer.

Baseline Dataset Citation

Cline Center Coup d’État Project Dataset, v2.2.2
Peyton, Buddy, Joseph Bajjalieh, Michael Martin, and Andrea Gerald. 2026. Cline Center Coup d’État Project Dataset. Cline Center for Advanced Social Research. V.2.2.2. February 17. University of Illinois Urbana-Champaign. doi: 10.13012/B2IDB-9651987_V10
⚑ This citation establishes the coded baseline record; use the claim-level sources above for the researched narrative.

Baseline Source-Document Entries

Wikipedia

New York Times

“Mr.Rhee Resigns,” April 27, 1960
“Rhee’s ministers Resign over riot; Offer an Apology” by Robert Trumbull, April 21, 1960

This is the citation trail carried by the baseline dataset, grouped by outlet and rejoined from the line-wrapped original. Coup Atlas has not independently re-checked every document; read the original before citing a specific claim. URLs the import damaged beyond safe repair are shown as plain text and listed in citations-report.md. How this list is built →

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