20–30 January - TheBattle of al-Hasakah, a large-scaleIslamic State (IS) attack andprison riot aimed at freeing arrested IS fighters from al-Sina'a prison inAl-Hasakah, which resulted in a partial strategic victory and major propaganda victory for IS over the Kurdish-led and US-backedSyrian Democratic Forces (SDF), with hundreds of prisoners, including important Emirs, being freed from captivity. The attack was the largest IS attack sinceit lost its last key Syrian territory in 2019.[2] 346 IS and 154 SDF fighters were killed, the SDF arrested 1,100 prisoners and 400 prisoners were found missing.[3][4]
26 September – The death toll from thecholera outbreak in Syria increases to 29, with a total of 338 cases reported, the majority of whom are inAleppo Governorate.[18]