Major YPG & allied forces victory[3] Military of ISIL YPG & YPJ: 5,500+[citation needed] Syriac Military Council (MFS): 1,500[10] 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 Western al-Hasakah offensive, dubbed Operation Commander Rûbar Qamishlo by the Kurds, was a military operation during May 2015 in the Al-Hasakah Governorate, during the Syrian Civil War, conducted by Kurdish YPG and allied forces against the Islamic State of Iraq and the Levant.

[23] On 15 May, the YPG, backed up by the Syriac MFS and Khabour Guards, advanced in the Tal Hormoz area amid continuing fighting and an ISIL car-bomb attack.

[32] Thus, they completed the first stage[13] of their two-week offensive successfully, recapturing Christian villages that ISIL militants took control of three months earlier and seizing Mount Abd al-Aziz.

[33] In all, since 6 May, the YPG and allied forces captured 4,000 square kilometers of territory throughout the western Al-Hasakah Governorate,[3] including 230 towns, villages and farmlands.

[34] Later that day, clashes on the administrative boundary between Al-Hasakah and Raqqa provinces took place that left 30 civilians dead at Nis Tal, on the Syrian–Turkish border, according to SOHR.

[36] The offensive originated from the ISIL-held town of Al-Shaddadah, south of Al-Hasakah,[37] and was the jihadist organizations's third assault on the city in 2015.

[2] On 15 July 2015, an ISIL militant attempted to carry out a suicide attack in the area between Tell Brak and al-Hawl; however, he was captured by the YPG, and the explosives were disarmed.