Rojava Syriac Union Party Al-Sanadid Forces[1] International Freedom Battalion[2]Supported by: CJTF–OIR Iraqi Kurdistan[3] Sipan Hemo(YPG chief commander) Rojda Felat[9](YPJ commander) Kino Gabriel[citation needed](MFS chief commander) Suleiman al-Shammari[10](MFS commander) YPG YPJ Syriac Military Council (MFS)SutoroKhabour Guards Military of ISIL Foreign intervention in behalf of Syrian rebels U.S.-led intervention against ISIL 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 The Eastern al-Hasakah offensive was launched in the Al-Hasakah Governorate during the Syrian Civil War, by the Kurdish-majority People's Protection Units, Assyrian militias, and allied Arab forces against the jihadist Islamic State of Iraq and the Levant (ISIL or ISIS), with the intent of retaking the areas of the Jazira Canton that had been captured by ISIL.

The offensive started on 21 February 2015,[4] and by the next day, the Kurds quickly advanced within five kilometers of Tal Hamis, after capturing 23 farms and villages[3] near the Abo Qasayeb area.

The Kurdish Peshmerga forces in Iraq shelled ISIL positions across the border, in coordination with the YPG during their advance.

[3] In response to the Kurdish offensive, on 23 February, ISIL launched a massive attack on a cluster of villages along the southern bank of the Khabur River around the town of Tell Tamer, using around 3,000 fighters[citation needed] and multiple tanks,[27] seizing 11 villages and kidnapping 220 Assyrians by 26 February, according to the SOHR.

[32] It was also reported that Abu Omar al-Shishani, ISIL's field commander in Syria, was leading the assault at Tell Tamer.

[20] By 28 February, since the start of the offensive, the fighting had left at least 175–211 ISIL militants[4][36][37] and 75 Kurdish and allied fighters dead.

[25] On 4 March, Syrian government forces advanced further and captured several villages, while ISIL continued shelling Kurdish fighters near Tell Tamer.

[46] The attack began around dawn and targeted at least three villages on the northern bank of the Khabur River, with ISIL's aim being to capture Tell Tamer and secure a corridor to the Iraqi border.

[27] The next day, ISIL advanced close to the town and heavy fighting ensued, but Kurdish reinforcements arrived and they managed to repel the militants.

[7][8] By this point, among Kurdish fighters killed in the offensive, there were three foreigners as well: an Australian, a Briton and a German female volunteer.

ISIL launched the assault to prevent Kurdish forces from reaching their stronghold of al-Hawl, by occupying the Kurds on multiple fronts,[40] attempting to seize another border crossing with Turkey, and due to fears that the Kurds would use Ras al-Ayn as a base to seize control of Tell Abyad, and link the Kobanî and Jazira Cantons.

[52] On 12 March, the Kurds managed to repel the ISIL advance on Ras al-Ayn resulting in dozens of casualties on both sides.

[61] The next day, the Iranian Fars News Agency reported that the Syrian Army advanced and captured the town of Malaha, as well as its surrounding farm areas.