Turkey like some other countries, such as France[33] and the UK[33] uses the name DAEŞ, DEAŞ, or DAİŞ, which is the group's Arabic acronym for (Dawlat al-Islam fil-Iraq wal-Sham) which the Islamic State considers as a derogatory insult.

[36][37][38][39] Several of the allegation have focused on Turkish businessman and politician Berat Albayrak, who has faced calls for his prosecution in the United States.

Among those receiving care was one of the top deputies of Islamic State chieftain Abu Bakr al-Baghdadi, Ahmet el-H, who was treated in a private hospital in Sanliurfa in August 2014.

[46][47] British newspaper The Guardian stated that Turkey, in late year 2014, "for many months did little to stop foreign recruits crossing its border to ISIS".

[49] On 29 November 2014, reports emerged of the Islamic State fighters allegedly launching an assault on Kobanî from Turkish territory.

[51][52] According to the German news outlet Der Spiegel, Islamic State fighters also attacked YPG positions near the border gate from Turkish soil.

51 people were killed and 140 injured in the attack,[56] the deadliest single act of terrorism to occur on Turkish soil[57][58] up until then—to be surpassed by the 10 October 2015 Ankara bombings with 102 mm.

In response to the attacks and claim, the Turkish government sent air and ground forces to increase the already heavy military presence in the area.

[59] On 28 January 2014, the Turkish air force, according to few sources, performed an airstrike on Syrian territory hitting a pickup, a truck and a bus in an Islamic State convoy, killing 11 militants and emir Abu Ja'afar ad-Daghistani.

[60][61][9] Conflicting reports however said it was fire from Turkish tanks and artillery hitting the Islamic State vehicles, after mortar shells had accidentally landed in Turkey.

Benyamin Xu (German), Çendrim Ramadani (Swiss) and Muhammed Zakiri (Macedonian) were all sentenced to life in prison for the attack.

[69] During early November 2014, in a move that surprised many, Turkish soldiers began training Peshmerga fighters in northern Iraq.

[63] Previously in March 2014, the Islamic State had threatened to attack the Tomb of Suleyman Shah (the grandfather of Osman I), although they were not near the area.

[48][84] Hürriyet Daily News suggested on 24 July that the no-fly zone was intended to "prevent radical groups such as ISIL or the (...) al-Nusra Front from gaining the mentioned land".

[84] While no official statement was released on the supposed deal on a 'no-fly zone', the British The Guardian speculated the deal to be part of Turkey's preoccupation with "thwarting Kurdish separatist ambitions in lawless parts of Iraq and Syria" and a prelude to the US allowing a possible Turkish military action against the YPG in the area.

[48] Turkish website Hürriyet Daily News on 25 July, again referring to unmentioned "sources", changed their earlier narrative and vocabulary.

[93] In the 4th issue of the Islamic State's Rumiyah, the Islamic State referred to Recep Tayyip Erdoğan and Necmettin Erbakan (one of Turkey's most famous Islamists) as ‘tawaghit’ and called their supporters ‘kuffar’ and called for people to ‘ask Allah for help and attack Turkey’ as well as to ‘stab those who support AK Party’.

In response to the bombing, the Turkish Army commenced tank and artillery strikes on Islamic State positions in Syria and Iraq.

On April 22, three people were killed and six others were wounded when Islamic State rocket projectiles hit the border province of Kilis.

[105] On April 28, five mortar shells targeting a border military post in the Karkamış district of the Gaziantep Province were fired by the Islamic State.

[107] On December 23, the Islamic State released a video which went viral, showing two captured Turkish soldiers, Fethi Şahin and Sefter Taş, being burned alive.

[109] On November 4, 2019, Turkish communications director Fahrettin Altun stated that Rasmiya Awad, Baghdadi's lesser-known older sister, had been captured.

[110][111] In 2021, Turkey extended its military presence in various African countries to fight against the Islamic State's Sahil Province, ISWAP, and ISCAP.

[36][37] On September 22, Turkish police announced the arrest of 10 people with links to the Islamic State in İzmir after intelligence revealed hidden explosives manufacturing supplies.

[115] On December, the Turkish Police arrested at least 304 people suspected of links to the Islamic State during simultaneous raids conducted across the country.