Case file
Murder of Leon Trotsky
On 20 August 1940, Leon Trotsky, a Russian revolutionary, Soviet politician, and political theorist living in exile, was fatally attacked at his residence in Mexico City by Ramon Mercader, a Spanish-born agent of the Soviet secret police (NKVD). At around 17:20 local time, Mercader struck Trotsky in the study with a mountaineering ice axe. The wide end of the axe fractured Trotsky's parietal bone and penetrated about 7 cm into his brain. The blow did not kill him instantly; witnesses said Trotsky struggled with his attacker, breaking Mercader's hand, before bodyguards burst into the room. Trotsky was taken to a nearby hospital and operated on, surviving for more than a day, and died on 21 August 1940 at age 60 from blood loss and shock.
The killing followed an earlier attempt. On 24 May 1940, armed assailants raided Trotsky's villa; his 14-year-old grandson, Vsevolod "Esteban" Volkov, was shot in the foot, and a young assistant and bodyguard, Robert Sheldon Harte, disappeared with the attackers and was later found murdered. The source account states it is probable that Harte was an accomplice who admitted the raiders. Trotsky's other guards repelled the attack. On 8 June 1940, Trotsky published an article, "Stalin Seeks My Death," in which he stated that another attempt was certain. According to the account, the operation to kill Trotsky had been organized by the NKVD after an earlier plan failed in March 1939 and formed part of a broader campaign to infiltrate Trotskyist networks in the United States and Europe.
By 27 August 1940, an estimated 300,000 people had passed by Trotsky's funeral casket in Mexico City. Mercader was tried and convicted of murder and served 20 years in Lecumberri Prison in Mexico City. Soviet leader Joseph Stalin publicly denied responsibility and dismissed Mercader as a Trotskyist, while, per the account, Mercader's mother received the Order of Lenin for her part in the operation. After his release in 1960 and resettlement in the Soviet Union in 1961, Mercader was awarded the Order of Lenin and named a Hero of the Soviet Union. In May 1975, the International Committee of the Fourth International launched "Security and the Fourth International," an inquiry into the assassination and the infiltration of the Trotskyist movement by Soviet intelligence agents.
Key facts
- Victims
- Robert Sheldon Harte, Leon Trotsky, Vsevolod "Esteban" Volkov
- Date
- 1940
- Location
- Leon Trotsky's residence, Mexico City, Mexico
- Case status
- solved
Case timeline
1939-03
An earlier plan to have Trotsky killed fails; the Soviet secret police (NKVD) is assigned to organize his assassination.
1940-05-24
Armed assailants raid Trotsky's Mexico City villa; his 14-year-old grandson is shot in the foot and bodyguard Robert Sheldon Harte disappears with the attackers.
1940-06-08
Trotsky publishes the article "Stalin Seeks My Death," predicting a further assassination attempt.
1940-08-20
Ramon Mercader attacks Trotsky with a mountaineering ice axe at his residence at about 17:20 local time.
1940-08-21
Trotsky dies of his injuries at a Mexico City hospital at age 60.
1940-08-27
By this date an estimated 300,000 people have passed by Trotsky's funeral casket in Mexico City.
1960
Mercader is released after serving 20 years in Lecumberri Prison.
1961
Mercader resettles in the Soviet Union, where he is later awarded the Order of Lenin and named a Hero of the Soviet Union.
1975-05
The International Committee of the Fourth International launches "Security and the Fourth International," an inquiry into the assassination and Soviet infiltration of the Trotskyist movement.
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People
Robert Sheldon Harte
VICTIMTrotsky's assistant and bodyguard; disappeared with the attackers during the 24 May 1940 raid and was later found murdered. The source account considers it probable he was an accomplice who admitted the raiders.
Ramon Mercader
CONVICTEDSpanish-born NKVD agent who attacked Trotsky with a mountaineering ice axe; tried and convicted of murder and imprisoned for 20 years in Lecumberri Prison, Mexico City.
Leon Trotsky
VICTIMRussian revolutionary, Soviet politician, and political theorist; fatally attacked with an ice axe at his Mexico City residence on 20 August 1940 and died the next day at age 60.
Vsevolod "Esteban" Volkov
VICTIMTrotsky's 14-year-old grandson; shot in the foot during the armed raid on Trotsky's villa on 24 May 1940 (1926-2023).
Roles reflect public records and court outcomes at the time of writing — supporting citations are on file under Sources.
Archival records
Places
Common questions
- What happened to the victim?
- Soviet exile Leon Trotsky was fatally attacked with an ice axe by NKVD agent Ramon Mercader at his Mexico City residence on 20 August 1940 and died the next day.
- Where did the murder happen?
- Leon Trotsky's residence, Mexico City, Mexico.
- Who was convicted?
- Ramon Mercader (Spanish-born NKVD agent who attacked Trotsky with a mountaineering ice axe; tried and convicted of murder and imprisoned for 20 years in Lecumberri Prison, Mexico City.).
- What is the current status of the case?
- Status: solved. Last verified July 2026.
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Sources
- ENCYCLOPEDICAssassination of Leon TrotskyWikipedia · 2026-07-05
- PRESSTrotsky Injured in Attack on Home (1940 archive)The New York Times · 2026-07-05
- PRESSLeon Trotsky assassination coverageBBC News · 2026-07-05
Record history
- First published
- JUL 06, 2026
- Last verified against sources
- JUL 06, 2026