The Battle of Aleppo, so farSyrian civil war battle in Aleppo has been called the biggest urban battle since Stalingrad in World War II. Here is the sequence of events.
EU: Aleppo attack a breach of international lawTop EU officials say attacks on civilians in the Syrian city of Aleppo amount to a "breach of international humanitarian law".
Syrian army launches new offensive on AleppoSyria's army announces an offensive to retake the rebel-held east of Aleppo, days after ceasefire fell apart.
Aleppo ablaze as resumed fighting intensifiesCeasefire a distant memory as heavy regime airstrikes hit rebel-controlled areas in battle of Aleppo. World powers cling to failed truce.
U.S. concludes Russia attacked Syrian aid convoyOfficials say the United States has reached the preliminary conclusion that Russian warplanes bombed aid convoy in Aleppo.
20 civilians killed in Syria aid convoy attackMore signs US-Russia brokered truce over, as airstrikes hit Red Crescent aid trucks, killing 20 and depriving many more of food & medicine.
Syria: 12 killed as aid convoy attacked18 trucks in a 31-vehicle convoy delivering aid attacked in Aleppo.
Renewed shelling in Aleppo as truce endsSyrian Army declares the US-Russia brokered ceasefire null and void, resumes shelling of rebel-held sections of Aleppo.
Besieged Aleppo turns to 'alternative' fuels250,000 residents of Aleppo have been left without electricity due to protracted siege, so they produce makeshift fuel out of plastic.
Syria regime accepts US-Russia truceCan the war in Syria be nearing an end? President Assad accepts US-Russian joint plan of pathway to end the conflict, but opposition unsure.
Air strike kills top jihadist rebel commanderAn air strike near Syria's battleground city Aleppo killed the military leader of the largest rebel alliance.
Syrian regime denies using chlorineSyrian government denies it used chlorine gas in an attack in Aleppo, following which dozens were treated for breathing problems.
Presidential nominee doesn't know about 'Aleppo'Libertarian presidential nominee Gary Johnson doesn't recognize the name of Syria's second largest city during a TV interview.
Syria regime retakes key Aleppo districtAssad forces retake strategic area as 'largest urban battle since World War 2' rages on, causing continued civilian suffering and privation.
Chemical watchdog concerned over chlorine attackOrganization for the Prohibition of Chemical Weapons says it is "disturbed" by the alleged use of toxic chemicals in Aleppo.
Syrian regime reportedly uses chlorine in AleppoDozens of people treated for breathing problems in Aleppo after regime helicopters drop barrel bombs which may have contained chlorine gas.
Syria regime advances south of AleppoSyrian government forces advanced on Sunday south of Aleppo as they pushed to once again encircle rebel neighborhoods and reimpose a siege.
Rebels conquer massive swath of SyriaSyrian opposition fighters have seized several areas in a rapid advance against government forces in central Hama province.
Barrel bomb attack in Aleppo kills 11 children15 civilians, including 11 children, killed in a barrel bomb attack on a rebel-held neighborhood of Syria's Aleppo.
Syria brutality enabled by anti-Israel double standardsThe violence in Syria has become routine. The UN focuses on alleged Palestinian deaths rather than on the enormous number of Syrian civilian killings.
UN official blasts 'sinful' carnage in AleppoUN top aid official Stephen O'Brien voices anger at world powers' inability to agree on a truce to allow aid into Syria's second city.
Syrian pound drops sharply against US dollarThe value of the Syrian pound fell sharply over the weekend due to petroleum shortage as a result the war ravaging the country.
More than 300 civilians dead in AleppoMore than 300 civilians have been killed in a three-week surge of fighting and bombardment in devastated city of Aleppo.
Russia: We did not bomb this boy's homeRussia says the viral Aleppo video shows a neighborhood out of bounds for its pilots, suggests rebel home-made rockets are to blame.
Russia in Syria: We will honor the UN 'pause'Russia has announced its intent to join a proposed UN weekly ceasefire to aid civilians embroiled in the Syrian conflict.
'Aleppo one of most devastating modern conflicts'Russia, U.S., ISIS, Hezbollah, Syria and others battle at expense of suffering civilian population.
Russia close to joining forces with U.S. in AleppoRussian Defense Minister says his country is close to joining forces with the United States around Syria's ravaged second city.
Dozens dead as warplanes pound north SyriaRussian and Syrian regime batter rebel-controlled areas in Aleppo and surrounding areas, killing at least 45 civilians.
France concerned over chemical attack in SyriaFrance alarmed at reports of a deadly chemical attack in the Syrian battleground city of Aleppo.
Russia searching for solutions for war-torn AleppoRussia is considering expanding a three-hour daily ceasefire in Aleppo. UN: A 48-hour halt in fighting was needed to bring in aid.
Syrian civil war coming to a head in AleppoRegime and rebel forces dig in for protracted battle in battered Aleppo, formerly the economic and cultural crown jewel of the country.
UN: Two million at risk of siege in AleppoUN demands "humanitarian pause" in fighting between regime forces and rebels in Aleppo so as to bring in food and medical supplies.
Rebel alliance launches battle to retake Aleppo"Army of Conquest" announces the start of a battle to recapture the whole of Aleppo.
Fighting in Aleppo after rebels 'break siege'Siege of Aleppo partially lifted after rebel groups break through regime forces, now other areas in danger of encirclement by rebels.
OPCW concerned over chlorine attack near AleppoChemical weapons watchdog voices concern over reports of a chlorine gas attack in which 24 people were injured.
Russia accuses Syrian rebels of using poison gasRussian defense ministry says seven people died in an attack by Syrian rebels using weapons loaded with a "poisonous agent".
Syrian regime forces close in on AleppoSyrian regime forces, backed by heavy Russian air raids, recaptured hilltops and villages on the southwest edges of Aleppo.
Syria: Rebel shelling kills 28 civilians in AleppoShells fired by Syrian rebel groups kills at least 28 civilians in southwestern districts in Aleppo.
Jihadists launch offensive in AleppoJihadist forces allied to rebels attack regime forces south and southwest of Aleppo.
Calls grow for Syria regime to end Aleppo siegeAid agencies urgently call on Bashar al-Assad regime to allow for supplies and civilians to come in and out of the besieged city.
Former Rabbi of Aleppo dies in New York at 93Rabbi Yom Tov Yedid, formerly the Rabbi of the ancient Jewish community of Aleppo, dies after a distinguished career in Torah scholarship.
Russia helps Aleppo residents escapeAs Syrian forces bomb Aleppo, Russia offers beleaguered residents "humanitarian escape corridors."
UN pleads for weekly 48-hour truce in Syria's AlepThe UN called for a 48-hour truce in besieged Aleppo, Syria, in order to send aid to the civilians.
Rebels launch fierce assault in Syria's AleppoOpposition forces in desperate push to retake key road into Syria's second city, prevent total siege.
Fierce fighting for key road despite Syria truceRegime forces move closer than ever to seizing strategically-important route, cutting off rebel supplies to Aleppo.
70 fighters killed in northern SyriaAt least 70 regime and rebel fighters killed in a government assault and a jihadist-led counterattack north of Aleppo.
Russia announces 48-hour ceasefire in AleppoRussia says a 48-hour ceasefire in the Syrian city of Aleppo will try to help stabilize it.
At least 70 killed in clashes near Syria's AleppoRegime, rebel and jihadist forces involved in fierce battle over strategic positions near Aleppo.
Life behind plastic in Syria's window-less cityRavaged by years of brutal civil war, civilians still left in Aleppo don't bother replacing their shattered windows anymore.
Syrian army announces extension of Aleppo truceTruce in Aleppo between regime forces and rebels extended by 48 hours.
Britain blasts Russia for blocking UN resolutionBritain slams Russia for blocking a UN Security Council statement condemning the Syrian military offensive in Aleppo.
Truce takes hold in Syria's AleppoSyria's war-ravaged second city enters 48-hour ceasefire, but prospects bleak for any long-term truce.
Syrian army agrees to truce in AleppoUnder pressure from Russia and the United States, Syrian army agrees to two-day truce in the war-ravaged city of Aleppo.
Kerry warns Assad against truce violationsSecretary of State John Kerry warns Syrian President of "repercussions" if his regime violates ceasefire being negotiated in Aleppo.
UN to hold urgent meeting on crisis in AleppoUN Security Council to discuss the crisis in Syria's frontline city of Aleppo.
Russian FM: Aleppo ceasefire 'within hours'Russian Foreign Minister Sergei Lavrov says talks under way to stop slaughter in Syria's Aleppo.
Can Russia and the US save Syria together?US and Russia working to stop bloodbath in Aleppo, which has brought landmark ceasefire deal to the brink of collapse.