[2] In 1980, the group began targeting active and retired Turkish politicians and security and military personnel, including assassinating prime minister Nihat Erim on 19 July.

[citation needed] The secretary, Mary Senyuz and the accountant Ali Ferah and Canan, his assistant were tied up in a separate room whilst the murder of Mr. Gandy took place in his office.

Although Dev Sol was under active investigation by the American, British, French, Austrian and Danish intelligence and security services, it posed a significant challenge for counter-terrorist agents because it was one of the few terrorist organizations (at that time) to employ professional operational and counterintelligence tradecraft.

It skillfully employed professionally forged documents and disguise, and it has been claimed by opponents that it preyed on innocent Turks living in Europe, extorting money from them in exchange for "protection."

Dev Sol also claimed the assassinations of Hiram Abas (1990), Memduh Ünlütürk, İsmail Selen, Adnan Ersöz and Hulusi Sayın (1991) and Kemal Kayacan (1992) – all retired figures of Turkish military or intelligence.

In its next significant act as DHKP-C on 9 January 1996, it assassinated Özdemir Sabancı, a prominent Turkish businessman, and two others: an associate Haluk Görgün and a secretary Nilgün Hasefe.

The murders were carried out by hired assassins who had been given access to the Sabanci Towers by a member, the student Fehriye Erdal, working there at that time.

On 4 June 1999 at approximately 6:00, 2 men of the DHKP-C armed with pistols and a light antitank weapon (LAW) attempted to attack the Consulate General of the United States, Istanbul.

[13] 2004 On 24 July 2004, another mistaken detonation, on a bus in Istanbul, occurred, killing Semiran Polat of DHKP-C and three more people and injuring 15 others.

[15] 2008 The group's Istanbul commander, Asuman Akça, was arrested in 2008 on the grounds that she was planning to assassinate Turkish Prime Minister Recep Tayyip Erdoğan.

[16] 2009 On 29 April 2009, Didem Akman of DHKP-C was wounded in her attempt to assassinate Hikmet Sami Türk at Bilkent University right before a lecture in constitutional law.

[17][better source needed] 2012 On 11 September 2012, a suicide bomber, a DHKP-C militant, blew himself up at the Sultangazi district in Istanbul killing himself, a Turkish national and a police officer.

The Turkish National Police identified the bomber as İbrahim Çuhadar, a member of DHKP-C.[18] DHKP-C on 11 December 2012 Gaziosmanpasa also killed a policeman.

2013 On 1 February 2013, a suicide bomber, a DHKP-C militant, blew himself up at the US embassy in Ankara, killing a Turkish security guard and wounding several other people.

DHKP-C claimed responsibility for the attack, saying it was meant "to punish (the) murderers of Berkin Elvan" and "to call to account the fascist state that protects AKP's corrupt, stealing ministers".

On 31 March 2015 suspected members of DHKP-C took prosecutor Mehmet Selim Kiraz hostage on the sixth floor of the Istanbul Çağlayan Justice Palace.

[35] Information provided by the Intelligence Resource Program of the Federation of American Scientists based on the 2003 Patterns of Global Terrorism report suggests that the organization has several dozen operatives within Turkey and a large support network in Europe.

[38][39] At 2013, Greek authorities arrested four militants on two separate operations near the Greece-Turkey border, while the DHKP-C was about to organize an attack on Turkish soil.

[43] On 19 March 2020, a Greek counter-terrorism unit raid on two houses in Sepolia and Exarcheia, resulted in the arrest of 26 suspected DHKP-C members and the seizure of heavy weaponry including anti-materiel guns.

[44] In November 2017, Greek police raided apartments in Athens and detained nine Turks (one woman and eight men) plotting to assassinate Recep Tayyip Erdoğan using rockets, during his visit to Greece at 2017.