Total siege begins On 2 February, the Iraqi Army fully severed the last supply lines between the Khalidiya Island region and the city of Fallujah, completely besieging the city. This led to concerns that an estimated 30,000–60,000 civilians trapped in Fallujah would starve, due to the lack of airdropped supplies into the city. On 10 February, it was reported that the Iraqi Army had fully recaptured the Khalidiya District, including the Khalidiya Island area.
Fallujah revolt and al-Karmah offensive From 15 to 19 February, the Iraqi Army launched an offensive into the town of
al-Karmah, located northeast of Fallujah, killing dozens of ISIL militants. On 18 February, On 20 February, the clashes began to decrease as ISIL began carrying out mass arrests, and it was reported that there were still some Sunni fighters who were pinned down in parts of Fallujah, who would likely be massacred if the Iraqi government or the US-led
CJTF–OIR coalition did not intervene. On 21 February, the Iraqi Army began shelling ISIL positions on the outskirts of Fallujah, in support of the Sunni tribal fighters. Late on 21 February, ISIL crushed the revolt, and detained 180 men. On the same day, the Iraqi Army deployed reinforcements to Fallujah in preparation to storm the city. On 23 February, the Iraqi Army fully recaptured the town of al-Karmah after they destroyed ISIL's last stronghold in the town. On 24 February, a CJTF–OIR coalition airstrike killed 30 ISIL militants in the Karama sub-district, just east of Fallujah.
Tightening the siege On 25 February, the Iraqi governor of Anbar province stated that the battle for Fallujah would begin soon, and that it would be much shorter than the battle for Ramadi. On the same day, the Iraqi Army tightened their siege on Fallujah, pushing into the outskirts of the city and securing all of the bridges leading into the city. On the same day, the Iraqi Army cleared the Albu Daeig district in southern Fallujah, killing 19 ISIL militants. and to the city of Mosul. After the defections, local sources estimated that there were only 400 ISIL militants remaining inside Fallujah city. Later on the same day, Iraqi government forces repelled a massive ISIL suicide attack in
Abu Ghraib and western
Baghdad, which was the largest attack carried out by the group in the area in nearly two years. The assault left 48 ISIL militants and 23 Iraqi soldiers dead. On 4 April, Iraqi security forces killed 150 ISIL fighters near Fallujah. CJTF–OIR coalition spokesman Col. Steve Warren said that US forces in Iraq could not confirm the number of extremist fighters killed, but some 100 militants were killed on the same day by airstrikes conducted by the coalition, which could have been part of the tally. On 6 April, eight Iraqi soldiers were killed in an attack launched by ISIL on a military barracks in al-Ma'amel village, east of Fallujah. On 9 April, ten civilians were killed and 25 others were injured after Iraqi Army airstrikes and artillery shelling targeted the al-Fallujah market and Nezal district in the downtown area of the city. On 10 April, six ISIL militants were killed by Iraqi Army artillery shelling in the area of Falahat, west of the city. On 21 April, the US-led coalition conducted an airstrike on an ISIL gathering in the Ahsi area near
Amiriyah Fallujah, killing the top ISIL commander in southern Fallujah, along with six of his assistants. On 26 April, warplanes bombarded a number of areas in al-Resala, central Fallujah, resulting in the death of eight civilians, including three children, and wounding 13 others. On 27 April, six ISIL militants were killed and five others were wounded, when the Iraqi Army bombarded ISIL positions in the city with artillery. On 28 April, coalition aircraft conducted three airstrikes on ISIL headquarters in the al-Rofah area, north of al-Karma District, killing 15 ISIL terrorists, including three leaders, named Khattab al-Halabusi, Aush al-Shami, and Mosadaq Abdel Galil. Meanwhile, an ISIL vehicle carrying machine guns was also destroyed. On 30 April, unidentified fighters attacked a gathering of ISIL militants near the Alwa area in the al-Joulan neighborhood, in central Fallujah, killing seven ISIL militants. On 2 May, Iraqi security forces carried out a large-scale military operation targeting ISIL gatherings in the al-Falahat area, killing 15 ISIL members and injuring ten others, as well as bombing a laboratory for manufacturing
booby-trapped vehicles. On 3 May, the Iraqi Army and allied militia forces launched an offensive in the southern Fallujah area, capturing the areas between Amiriyah and Fallujah city. By the next day, Iraqi government forces had come within 3 kilometers of Fallujah's southern entrance, capturing four villages, killing 100 ISIL militants, and destroying ten ISIL
tunnels. On the morning of 5 May, violent clashes broke out between two ISIL factions belonging in Nazzal neighborhood, in central Fallujah, after the theft of 700 million dinars that were deposited with one of the ISIL leaders called Jabbar Auf, resulting in the killing of ten ISIL members and injuring eight others. Meanwhile, Anbar Operations Commander Major General Ismail Mahlawi told
Anadolu Agency that the Iraqi Army had captured five areas of the city. On 7 May, Iraqi security forces conducted operations that targeted the headquarters and gatherings of ISIL in the areas of al-Hur and Zebin al-Hanshl in the vicinity of Amiriyah Fallujah, resulting in the death of 25 ISIL elements. On 8 May, coalition warplanes carried out an airstrike on ISIL positions in south of Fallujah, killing 14 ISIL militants. Warplanes also destroyed three car bombs and killed their suicide bombers as they were trying to attack Iraqi security forces in the same area near Fallujah. On 9 May, the
Iraqi Air Force bombarded two ISIL buildings, two caches of weapons, and 60 rocket launchers in the area of Albu Shehab and Amiriyah Fallujah. Earlier on the same the day, 20 ISIL militants were killed during an aerial bombardment in south of Fallujah. Between 4–9 May, 140 ISIL militants were killed in clashes in the western and southern suburbs of Fallujah. On 10 May, it was reported that 2,000 families were trapped in two villages,
Albu Huwa and
Hasai, and were being used as human shields by ISIL. On 11 May, eight ISIL militants were killed and two more were wounded, as coalition warplanes conducted two airstrikes against a booby-trapped ISIL vehicle near the
Fallahat and
Halabisah villages. On 14 May, ISIL forces claimed to have killed 100+ Iraqi forces in a large suicide attack at the residential compound in Amiriyah Fallujah. Another report put the death toll at 70 soldiers and one policeman. ==Aftermath – late May offensive==