The following is a timeline of the Syrian Civil War from January to July 2015. Information about aggregated casualty counts is found at Casualties of the Syrian Civil War.

January 2015

2 January The FSA and al-Nusra Front launch an offensive against Hezbollah strongholds in the Jirud Fleita area, of western Kalamoon, near the Lebanese border. Media sources affiliated with the Syrian opposition report that the joint forces targeted a series of military checkpoints held by Hezbollah in the area surrounding the village of Flaita in Kalamoon. Heavy losses were reported in the ranks of the pro-Assad security forces and militants of Hezbollah, as the FSA rebels seized a number of heavy and light weapons as well as boxes of ammunition during the operation. At least three FSA fighters were killed. A military official of al-Nusra reported that the ISIS presence in the area has exceeded 700 men, amid fears of escalating violence between both groups.Syrian rebels report gains against Hezbollah in Kalamoon . 3 January 2015. Ara News. Retrieved 2015-01-22.

6 January The Combined Joint Task Force combating ISIL conducts ten airstrikes in Syria, eight of them targeting the contested city of Kobani, with the airstrikes destroying fourteen ISIL fighting positions and a building.

23 January A Syrian airstrike killed at least 40* 6 January - The Combined Joint Task Force combating ISIL conducts ten airstrikes in Syria, eight of them targeting the contested city of Kobani, with the airstrikes destroying fourteen ISIL fighting positions and a building. people in a rebel-held suburb of Damascus. The Syrian air force carried out more than 5,000 airstrikes between 20 October 2014 and 20 January 2015.

24 January The YPG clashed with Syrian government forces in Al-Hasakah city.

25 January Hundreds of rebels armed with rocket launchers and anti-aircraft weapons take over the Brigade 82 base near the town of Sheikh Maskeen, close to the main north–south highway between the capital Damascus and Jordan. The base, one of several used to pound rebel-held villages and towns in southern Syria and along the frontier with Jordan, lies at the heart of a heavily fortified zone which formed a southern line of defense protecting Damascus. The Southern Front coalition says that this advance will help the rebels cut supply routes of Syrian government forces in the south from their supplies in the north to be able to eventually take over Deraa city. The capture of the base helped the rebels to overrun most of the nearby town of Sheikh Maskeen, which they attacked several times in last few months, but failed to seize.Syria rebels overtake strategic base in south. 25 January 2015. Retrieved 2015-01-26

26 January Kurdish fighters recapture at least 90% of Kobanî, Syria from ISIS.

27 January

It is reported that many of the Syrian rebel groups which were previously favored by the CIA would have their money and supplies cut off or substantially reduced.

Israeli security forces claim that Hezbollah and forces loyal to the President of Syria Bashar al-Assad were responsible for firing rockets from Syrian territory onto the Golan Heights into the Mount Hermon ski resort.

28 January Hezbollah fired anti-tank missiles at an Israeli military convoy in Shebaa farms near the Lebanon border, killing two soldiers and wounding seven. In response, Israel fired at least 50 artillery shells across the border into southern Lebanon, resulting in fire-exchanges with Hezbollah, in which a Spanish UN peacekeeper was killed.

February 2015

5 February Islamist militant leader Zahran Alloush claimed that a 120-rocket attack that killed three people was a taste of what the government had visited on eastern Ghouta. Syrian Air force airstrikes killed at least 65 people in the Eastern suburbs of Damascus unknown quantities of them insurgents. According to rebel activists, the air force carried out more than 60 strikes on the suburbs of Douma, Saqba, Kafr Batna, Jobar, and Erbin.

6 February ISIL claims that the American female hostage Kayla Mueller has been killed by Jordanian airstrikes at the outskirts of Raqqa, Syria. The White House says that they have no proof of her death.

9 February Five civilians were killed and dozens others injured due to aerial bombardment launched by Syrian government aircraft in the eastern Ghouta of Damascus countryside.Syrian warplanes attack residential areas in Damascus, casualties reported. Retrieved 2015-12-27.

14 February The Kurds regain control of at least 163 villages around Kobani in the three weeks since they pushed ISIS fighters out of the town.Kurds, Syrian rebels edge into Islamic State stronghold: monitor. 02-15-2015. Retrieved 02-15-2015

15 February Kurdish forces backed by Syrian rebel groups take control of a hill south of Kobani which lies within the Raqqa province - the stronghold of ISIS. It is the first time the Kurds had entered Raqqa.

17 February During an offensive aimed at cutting rebel supply lines to the Turkish border, Syrian government forces entered the village of Ratyan, north of Aleppo, and executions took place.Syria forces execute 10 children of alleged rebels: Report. 21 Feb 2015. Retrieved 2015-02-21.

18 February Rebels retake the village of Ratyan and capture 32 Syrian Army soldiers and pro-government gunmen, where fighting is raging as the two sides try to grab new territory ahead of a possible truce. More than 170 fighters are killed from both sides in the clashes.Rebels capture 32 Assad gov't troops and allied gunmen in Aleppo. 19 Feb 2015. Retrieved 2015-02-21.

19 February Doctors Without Borders urges all parties to facilitate the evacuation of people wounded in the clashes near Aleppo, which it says had triggered a new wave of displaced families trying to reach the Turkish border to seek shelter. Medical staff are forced to evacuate an MSF facility on the outskirts of Aleppo because of the worsening insecurity.

Rebels recapture the village of Hardatnein near Aleppo, two days after it was taken by Syrian government forces. Intense clashes are taking place outside a third village, Bashkoy, which was also taken by the government on 17 February.

21 February The SOHR monitoring group reports that ten children were among at least 48 people killed in Rityan village when Syrian government forces executed six families of rebel fighters. Villagers had discovered the bodies when they returned to their homes after the government forces withdrew on 18 February. Five women and 13 rebels from the six families were among the dead. There was no resistance except in one house where a rebel opened fire at troops before being executed along with his family. Some of the bodies had been mutilated.

Eight people—among them two women and two children—are killed when a barrel bomb hit a building in an opposition-held area of Aleppo. Five people are also reported killed during the rebel shelling of government-held areas of the city.

The Syrian Air Force kills at least seven people in rebel areas east of Damascus.

Turkish Army forces entered Syria to evacuate soldiers guarding the Tomb of Suleyman Shah, a Turkish exclave inside the Aleppo Governorate, and remove the sarcophagus. One Turkish soldier was killed in what a government official called an "accident" during the operation. The Turkish military convoy reportedly traveled through the town of Kobanî, recently liberated from ISIL control by Kurdish and FSA forces with coalition air support.

24 February According to the Syrian Observatory for Human Rights, ISIL has abducted 90 Assyrian Christians after it seized Assyrian villages near Tell Tamer from Kurdish forces.

27 February Kurdish forces dealt a blow to ISIL by capturing Tel Hamis, a strategically important town in north-eastern Syria. The British-based Observatory said that Kurdish forces killed at least 175 members and commanders of the ultra-hardline Islamist militants in an offensive which began last weekend.

28 February

ISIL forces retreat following clashes in Tall Brak, a town in north-east Syria in the al-Hasakah governorate, in the second ISIL defeat in two days after also retreating from Tel Hamis.

March 2015

4 March

Rebels set off a large quantity of explosives in a tunnel running underneath or near Air Force Intelligence's headquarters in the Jamiat al-Zahra district of Aleppo, causing part of the building to collapse and reverberating throughout most of the city. Immediately after, heavy fighting broke out, with al-Nusra Front fighters and hardline Islamist rebel groups bombarding the area and attempting to advance. Syrian government forces responded with artillery and called in air strikes, eventually repelling the attackers. The dead included members of Air Force Intelligence, pro-Syrian government militiamen and Hezbollah fighters, as well as rebel attackers.Syria conflict: Blast 'hits Aleppo intelligence HQ'. Retrieved 2015-03-04.

5 March

In retaliation for the Air Force Intelligence headquarter attack, the Syrian army conducted an air strike against al-Nusra Front in the al-Habit area. As a result, the jihadists' military chief Abu Homam al-Shami was killed, along with three other prominent leaders. Meanwhile, in Aleppo, the government forces launched an attack on the rebels in the west of the city.Government forces reportedly launched an assault on rebel positions in the west of the city. Retrieved 2015-03-05.

7 March

The head of the rebel-aligned Al-Anfal Brigade, alongside 70 of its fighters, laid down their weapons to the SAA.Reuters:Seventy insurgents defect to Syrian army in Damascus suburb. Retrieved 2015-03-13.

13 March

The Liwaa Hateen Brigade from the Rif Dimashq Governorate defected to the National Defense Forces after fighting the SAA for more than three years.Rebel brigade defects to the National Defense Forces in southern Damascus. Retrieved 2015-03-13.

16 March

The rebel-aligned Liwaa Sham Al-Rasoul brigade surrendered to the Syrian government-backed National Defense Forces (NDF). According to a military source, this is the third rebel group to defect from the FSA in 8 days – the other two rebel groups defected in the Yarmouk Camp and Al-Tadamon Districts.

20 March A military-related source confirmed the downing of a drone identified as a U.S. MQ-1 Predator; the aircraft was reportedly shot down in the Latakia Governorate.

22 March The Al-Nusra Front down a government helicopter in the Idlib province. Four crew members are captured and a fifth is reportedly executed.

23 March Islamic State fighters move to attack the government-held Tadmur airbase near Homs as they continue their westward offensive. Islamic State fighters also down a Syrian government Su-24 warplane near the Shaar gasfield east of Homs.

25 March

Al Nursa Front and allied groups begin their offensive against Idlib. "A coalition of armed opposition groups, operating under the name "The Victory Army", have now taken "around 10 percent" of the city after seizing a series of checkpoints along Idlib's perimeter Tuesday and Wednesday, Abu al-Yazid, a spokesman for Ahrar a-Sham, one of the participating battalions, told Syria Direct Wednesday."

28 March The Al-Nusra Front have announced the capture of Idlib.

31 March Jordan closes the Nasib crossing, its only functioning border crossing with Syria, following heavy clashes on the Syrian side between rebels and Syrian state forces.IS enters Palestinian camp in Damascus; Jordan closes border . Retrieved 2015-04-01.

April 2015

1 April Islamic State fighters infiltrate the Palestinian refugee camp Yarmouk from the nearby Hajar Aswad neighborhood in Damascus and clash with members of an anti-Assad Palestinian faction called Aknaf Beit al-Maqdis. Large parts of the camp are taken by ISIS.