Meruzhan Artzruni, Lord Prince of Vaspurakan (? – 369), for conspiring with one of the Great Persian Kings, Shapur II against his liege-lord, Armenian King Arsaces II (Arshak II), whom he betrayed to Persia. He was captured by Arsaces II's son King Papas (Pap) and executed.
Werner Teske was accused, convicted, and executed for "planned treason" by embezzling funds and plotting to defect to West Germany; his sentence was posthumously overturned after German reunification.
Ratu Jope Seniloli, incumbent Vice-President (in 2004), for his role in the coup of 2000. Sentenced to four years in prison; released by a sympathetic government after three months.
Finland
Lauri Törni, for having served with the Waffen-SS at the end of World War II, later received a presidential pardon
Marinus van der Lubbe, for high treason and arson in the Reichstag fire case, in 1933; the extent of his true responsibility is still disputed by historians
Petros Protopapadakis, Minister of Economy in Dimitrios Gounaris' government and later Prime Minister of Greece (1922), convicted of treason for the Asia Minor catastrophe. Executed 15 November 1922.
Nikolaos Stratos, Minister of Internal Affairs in Gounaris' government, convicted of treason for the Asia Minor catastrophe. Executed 15 November 1922.
Georgios Baltatzis [el], Minister of Foreign Affairs in Gounaris' government, convicted of treason for the Asia Minor catastrophe. Executed 15 November 1922.
Nikolaos Theotokis [el], Minister of Military Affairs in Gounaris' government, convicted of treason for the Asia Minor catastrophe. Executed 15 November 1922.
Georgios Hatzanestis, commanding officer of the Asia Minor and Eastern Thrace Greek army, convicted of treason for the Asia Minor catastrophe. Executed 15 November 1922.
Michail Goudas [el], rear admiral and minister in Gounaris' government, convicted of treason for the Asia Minor catastrophe. Sentenced to life imprisonment.
Xenophon Stratigos, major general and minister in Gounaris' government, convicted of treason for the Asia Minor catastrophe. Sentenced to life imprisonment.
George Papadopoulos, Greek colonel, leader of a military junta (1967–1973), convicted of treason and jailed for life, died in Korydallos prison 27 June 1999.
Emilio De Bono, convicted and executed by firing squad at the Verona trial for voting yes on the 25 July 1943 motion in the Grand Council of Fascism to depose Benito Mussolini.
Luciano Gottardi, convicted and executed by firing squad at the Verona trial for voting yes on the 25 July 1943 motion in the Grand Council of Fascism to depose Benito Mussolini.
Giovanni Marinelli, convicted and executed by firing squad at the Verona trial for voting yes on the 25 July 1943 motion in the Grand Council of Fascism to depose Benito Mussolini.
Carlo Pareschi, convicted and executed by firing squad at the Verona trial for voting yes on the 25 July 1943 motion in the Grand Council of Fascism to depose Benito Mussolini.
Hussain Haqqani, for involvement with a secret memo to Admiral Michael Mullen asking for US intervention in changing Pakistan's military and intelligence agencies.
Ryszard Kukliński ("Jack Strong"), escaped to the US in 1981, sentenced to death in absentia in 1984, in 1990 sentence changed to 25 years of imprisonment, in 1995 sentence cancelled due to search of the 1st President of the Supreme Court, fully pardoned in 1997
Jean-Louis Jeanmaire, sentenced to 18 years of prison (released after 12 for good behavior) for leaking information to the Soviet KGB.
Turkey
Abdullah Öcalan, life sentence (originally death penalty) for trying to establish a Kurdish state in Turkey.
Ukraine
Viktor Yanukovych, found guilty of treason in absentia by a Kyiv court. Yanukovych fled Ukraine to Russia after the 2014 Ukrainian Revolution. He was subsequently impeached and tried for treason in absentia.[11]
William Joyce, alias 'Lord Haw-Haw', for broadcasting Nazi propaganda to the United Kingdom during World War II. Hanged on 3 January 1946. Last person to be executed for treason in the United Kingdom.
Arthur Thistlewood, John Brunt, William Davidson, James Ings, Richard Tidd, Charles Cooper, Richard Bradburn, John Harrison, James Wilson and John Shaw Strange participants of the 1820 Cato Street Conspiracy
Jeremiah Brandreth, Isaac Ludlam and William Turner convicted and executed for High Treason following their part in the Pentrich Revolution of 1817.[12]
John Fries, the leader of Fries' Rebellion, was convicted of treason in 1800 along with two accomplices, and pardoned that same year by John Adams.
Governor Thomas Dorr 1844, convicted of treason against the state of Rhode Island; see Dorr Rebellion; released in 1845; civil rights restored in 1851; verdict annulled in 1854.
Hipolito Salazar, hanged on April 9, 1847. Convicted of treason for rebelling against the military occupation of New Mexico in the Taos Revolt during the Mexican-American War. He was a Mexican citizen on then-Mexican soil, and George W. Crawford, Secretary of War in the Zachary Taylor administration, later concluded that Salazar had been wrongfully convicted.
Walter Allen was convicted of treason on September 16, 1922 for taking part in the 1921 Miner's March against the coal companies and the U.S. Army at Blair Mountain, West Virginia. He was sentenced to 10 years and fined. During his appeal to the Supreme Court, he disappeared while out on bail. United Mineworkers of America leader William Blizzard was acquitted of the charge of treason by the jury on May 25, 1922.[14]
Max Stephan, a German-born Detroit tavernkeeper, was convicted of treason on July 2, 1942, after the jury deliberated for only one hour and 23 minutes. In April 1942, Stephan harbored and fed a Luftwaffe pilot at his tavern who escaped from a Canadian POW camp.[15] On August 6, Judge Arthur J. Tuttle sentenced Stephan to death by hanging.[16] He was the first man convicted and sentenced to death on a federal treason charge since the Civil War. His sentence was later commuted by President Franklin D. Roosevelt to life in prison.[17]
Hans Max Haupt, Walter Otto Froehling and Otto Richard Wergin were convicted of treason and sentenced to death, and Erna Emma Haupt, Lucille Froehling and Kate Martha Wergin were convicted of treason and sentenced to 25 years in prison on November 24, 1942, in a joint indictment.[18] All six individuals were charged with treason for giving aid and comfort to the executed German saboteur Herbert Hans Haupt. On appeal, these judgments were reversed and remanded to be retried.[19] Hans Max Haupt was convicted again on June 9, 1944.[20] He was sentenced to life in prison. He appealed again, but the Seventh Circuit Court of Appeals affirmed this judgement.[21] Walter Otto Froehling and Otto Richard Wergin were sentenced to 5 years in prison on July 22, 1944 as accessories to treason.[22] Hans Max Haupt eventually appealed the case up to the Supreme Court, which sustained the verdict against him.[23]
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 233.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 155.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 175.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 112.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 95.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 214.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 229.
^Valode, Philippe (2007). Les Grands traitres de l'histoire. Paris, France: First Edition. p. 203.
^Conway, Moncure Daniel (1893) [1892]. The Life of Thomas Paine. New York: Knickerbocker Press. p. 375. Archived from the original on 2009-04-18. Retrieved 2006-07-06.
^"Prisoners Pardoned". Hawaiian Gazette. Honolulu. January 3, 1896. Retrieved June 20, 2010.