By Umar Bashir
September 7 - Bauchi prison break - 5 people are killed and 721 inmates are freed from prison in Bauchi by suspected Boko Haram gunmen.
December 31 - December 2010 Abuja attack - a bomb attack outside a barracks in Abuja kills four
May 29 - May 2011 northern Nigeria bombings - 15 people are killed in Abuja and Bauchi after bombs explode in several towns in northern Nigeria during Goodluck Jonathan's swearing in as the new president.
June 16 - 2011 Abuja police headquarters bombing - at least two people, the perpetrator and a traffic policeman, are killed in a failed bombing of Abuja's police headquarters. It is Nigeria's first
August 26 - 2011 Abuja United Nations bombing - 21 people are killed in a bombing attack on a
United Nations compound in Abuja.
November 4 - 2011 Damaturu attacks - between 100 and 150 people are killed in a series of coordinated assaults in northern Nigeria.
December 22–23 - December 2011 Nigeria clashes - 68 people, of whom are 50 militants, at least 7 soldiers, and 11 civilians, are killed in clashes between Boko Haram militants and Nigerian soldiers in
Maiduguri and Damaturu .
December 25 - December 2011 Nigeria bombings - 41 people are killed by Boko Haram bomb attacks and shootings on churches.
During 2012, 792 people were killed as a result of the Boko Haram insurgency. 
January 5–6 - January 2012 Northern Nigeria attacks - around 37 Christians are targeted and killed by Boko Haram militants.
January 20 - January 2012 Northern Nigeria attacks, 183 people, of whom at least 150 are civilians and 32 are police officers, are killed in
Kano State by Boko Haram gunmen.
April 8 - April 2012 Kaduna bombings - 38 people are killed following a bombing at a church in
June 17 - June 2012 Kano church bombings - around 40 Christians are killed by Boko Haram at churches in Kano.
June 17 - June 2012 Kaduna church bombings - 19 people are killed following bomb attacks against three churches in Kaduna.
August 7 - Deeper Life Church shooting - 19 people are killed when Boko Haram gunmen raid a church in Kogi State.
August 8 - Two Nigerian soldiers and one civilian are killed in a mosque in an apparent reprisal attack for yesterday's massacre. 
October 1-2 - Federal Polytechnic, Mubi attack - at least 25 people were killed at the Federal Polytechnic, Mubi , Adamawa State.
December 25 - December 2012 shootings in Northern Nigeria - 27 Christians are killed in Maiduguri and Potiskum by suspected Boko Haram militants.
December 28 - Another 15 Christians are killed in the village of Musari by unknown gunmen. 
2013 fatalities were at least 1,000-1,007:
January 1 - Nigerian Army raid kills 13 militants. 
January 4 - Ogun prison break , 15 inmates are freed in a prison break in Ogun State. Boko Haram is not suspected to be involved in the attack.
February 8 - Attack on polio vaccinators kills 9 women. 
March 18 - 2013 Kano bus bombing - between 22 and 65 people are killed in Kano by a car bombing. 
April 16 - 2013 Baga massacre - 187 people are killed in Baga in Borno State. It is unclear whether the Nigerian military or Boko Haram is responsible for the massacre. 
June - 9 children are killed in Maiduguri and 13 students and teachers are killed in Damaturu by Boko Haram. 
June 30 - Ondo prison break - 2 people are killed and 121 inmates escape following a prison break in
Ondo State. Claims that Boko Haram took part in the attack are dispelled.
July 6 - Yobe State school shooting - more than 42 are killed by Boko Haram gunmen in a Yobe State school. 
August 11 - Konduga mosque shooting - 44 people are killed and 26 others injured in a mass shooting by Boko Haram in a mosque in
Konduga, Borno State. 
September 12 - Ambush by Boko Haram leaves 40 soldiers dead. 
September 12–18 - An offensive by Nigerian Army leaves 150 Islamists and 16 soldiers dead. 
September 19 - Benisheik massacre - 161 are killed in attacks in Borno State blamed on Boko Haram. 
September 20 - An Abuja shootout leaves 7  -9  killed.
September 29 - Gujba college massacre - more than 50 students are killed in Yobe State by Boko Haram gunmen. 
October 10 - An attack at Damboa leaves at least 20 killed (15 suspected militants and 5 civilians). 
October - Government forces raid rebel camps, killing around 101 Boko Haram fighters. 
October 29 - Boko Haram raids Damaturu. At least 128 people are killed (95 militants, 23 soldiers, 8 policemen, and 2 civilians). 
January 14–35 people are killed in a bombing by Boko Haram militants in Maiduguri, Borno State. 
January 26 - January 2014 Northern Nigeria attacks - 138 killed in total
January 31 - 11 Christians killed in Chakawa by Boko Haram militants. 
February 14 - Borno massacre - 121 Christian villagers killed by Boko Haram militants in Konduga, Borno State.
February 15 - Izghe attack - 106 killed the village of Izghe, Borno State by Boko Haram gunmen.
February 15 - 90 Christians and 9 Nigerian soldiers are killed in Gwosa by Boko Haram. 
February 24 - Dozens killed as Boko Haram again raids Izghe. 
February 25 - Federal Government College attack - 59 male students killed in a school massacre in Yobe State.
March 14 - Boko Haram attacks the heavily fortified Giwa military barracks in Maiduguri, freeing comrades from a detention facility. The military then executes about 600 unarmed recaptured detainees, according to Amnesty International. 
April 14 - April 2014 Abuja bombing - over 88 people killed in a twin bombing attack in Abuja.
April 15 - Chibok schoolgirls kidnapping - 276 female students in Borno State are kidnapped by Boko Haram.
May 1 - May 2014 Abuja bombing - 19 killed in Abuja by a car bomb.
May 5 - 2014 Gamboru Ngala attack - at least 300 people are killed in the twin towns of Gamboru and Ngala in Borno State by Boko Haram militants.
May 20 - 2014 Jos bombings - at least 118 villagers are killed by car bombs in the city of Jos.
May 21 – 27 villagers are killed by Boko Haram gunmen in northeastern Nigeria. 
May 27 - May 2014 Buni Yadi attack - 49 security personnel and 9 civilians are killed during a Boko Haram attack on a military base in Yobe State.
May 30 - The third emir of Gwoza,
Idrissa Timta , is assassinated during a Boko Haram ambush.
June 1 - 2014 Mubi bombing - at least 40 people are killed by a bomb in Mubi.
June 2 - Gwoza massacre - at least 200, mostly Christians, are killed in several villages in Borno State by Boko Haram.
June 20–23 - June 2014 Borno State attacks - at 70 people are killed and 91 women and children kidnapped by Boko Haram militants in Borno State.
June 23–25 - June 2014 central Nigeria attacks - around 171 people are killed in a series of attacks in the Middle Belt of Nigeria.
June 26 - Over 100 militants are killed by the Nigerian military during a raid on two Boko Haram camps. 
June 28 - 11 people are killed by a bomb in Bauchi. 
July 18 - At least 18 are killed by a Boko Haram attack in Damboa, leaving the town almost destroyed. 
July 22 - 51 people are killed by Boko Haram in Chibok. 
September 12 - Battle of Konduga
September 19 - Around 30 people are killed by Boko Haram militants at a busy market in Mainok, Borno State. 
October 10 - Lagos prison break - one inmate is killed following a failed attack to free inmates in a Lagos prison. Boko Haram is not suspected to be involved in the attack.
October 31 - At least 4 people are killed, 32 injured and 13 vehicles destroyed by an explosion at a bus station in Gombe. 
November 2 - Kogi prison break - 99 inmates in Kogi State are freed by suspected Boko Haram rebels.
November 3–10 - 2014 Yobe State attacks - a double suicide bombing in Yobe State kills 15 Shiites on the 3rd and 46 students on the 10th.
November 25 - Over 45 people are killed by two suicide bombers in Maiduguri, Borno State. 
November 27 - Around 50 people are killed in Damasak by Boko Haram militants. 
November 28 - 2014 Kano bombing - at least 120 Muslim followers of the Emir of Kano, Muhammad Sanusi II, are killed during a suicide bombing and gun attack by Boko Haram. The 4 gunmen are subsequently killed by an angry mob.
November 30 - Ekiti prison break - 274 inmates escape a prison in Ekiti . Claims that Boko Haram perpetrated the attack are refuted.
December 1 – at least 5 people are killed by two female suicide bombers who detonated explosions at a crowded market place in Maiduguri, Borno State. 
December 6 - Minna prison break , 270 prisoners are freed from a prison in Minna . Boko Haram is not suspected to be involved in the attack.
December 10 - At least 4 people are killed and 7 injured by female suicide bombers near a market in Kano. 
December 11–30 people are killed and houses are destroyed by Boko Haram militants in Gajiganna, Borno State. 
December 13 - 2014 Gumsuri kidnappings , between 32 and 35 are killed and between 172 and 185 are kidnapped by Boko Haram in Borno State.
December 22 - 2014 Gombe bus station bombing, at least 27 people are killed at a bus station by a bomb in Gombe State.
December 28–29 - December 2014 Cameroon clashes , 85 civilians, 94 militants, and 2 Cameroonian soldiers are killed following a failed Boko Haram offensive into Cameroon's Far North Region .
January 1 - Cameroon bus attack - Boko Haram militants attack a bus in Waza, Cameroon, killing eleven people and injuring six. 
January 3–7 - 2015 Baga massacre - Boko Haram militants raze the entire town of Baga in north-east Nigeria. Bodies lay strewn on Baga's streets with as many as 2,000 people having been killed. Boko Haram now controls 70% of Borno State, which is the worst-affected by the insurgency.
January 3 - Fleeing villagers from a remote part of the Borno State report that Boko Haram had three days prior kidnapped around 40 boys and young men. 
January 5 - News emerges that two days prior hundreds of Boko Haram militants had overrun several towns in northeast Nigeria and captured the military base in Baga. 
January 9 - Refugees flee Nigeria's Borno State following the Boko Haram massacre in the town of Baga. 7,300 flee to neighbouring Chad while over 1,000 are trapped on the island of Kangala in Lake Chad. Nigeria's army vows to recapture the town, while Niger and Chad withdraw their forces from a transnational force tasked with combating militants. 
January 10 - A female suicide bomber, believed to be around 10 years old, kills herself and 19 others, possibly against her will, at a market in the northeastern city of Maiduguri, Nigeria. 
January 11 - More female suicide bombers, this time two, and again each believed to be around 10 years old, kill themselves and three others at a market in the northeastern city of Potiskum , Nigeria. 
January 12 - January 2015 Kolofata raid - Boko Haram militants launch a failed raid on Kolofata in Cameroon. The Cameroonian military claims the army lost only one officer while the Islamic group lost between 143-300 rebels.
January 16 - The Military of Chad enters Cameroon to assist in fighting against Boko Haram insurgents. 
January 17 - Following the January 16 Chad authorities decision to send troops to Nigeria and Cameroon to fight Boko Haram militants, the Russian ambassador to the country pledges to supply Cameroon with more modern weapons to combat the Islamist insurgents. 
January 18 - Boko Haram militants kidnap 80 people and kill three others from villages in north Cameroon. 
January 20 - Boko Haram leader Abubakar Shekau claims responsibility for the attack on the town of Baga, Nigeria in which an unknown number of civilians were killed. 
January 24 - 15 people are killed as Boko Haram gunmen attempt to burn down the village of Kambari near Maidaguri. 
January 25 - Boko Haram rebels launch a large offensive against Nigerian forces in Maiduguri, the capital of Borno State, leading to the deaths of at least 8 civilians, up to 53 militants, and an unknown number of soldiers.  Although the attack fails, the rebels manage to capture the nearby strategic town of Monguno . The status of the 1,400 soldiers stationed in Monguno is unknown. As a result of these attacks, Boko Haram now controls four out of five roads leading into the major city, prompting fears that it will be taken as well. 
January 28 - Boko Haram fighters killed 40 people while on a rampage in Adamawa State. 
January 29 - The Nigerian military, in collaboration with Chadian soldiers, captures the border town of Michika from Boko Haram rebels. 
January 31 - The African Union pledges to send up to 7,500 international soldiers to aid Nigeria's fight against Boko Haram. Chadian forces claim to have killed 120 Boko Haram fighters while losing only 3 soldiers of their own during fighting in the north of Cameroon. 
February 1 – Boko Haram again attacks the capital city of Borno State, Maiduguri. This time, the city is attacked from four out of the five sides.  The attack is unsuccessful, but many civilians inside the city panic.  Also, a suspected Boko Haram suicide bomber kills himself and eight others at the residence of a politician in Potiskum . Another suicide bomber kills five people outside a mosque in Gombe . 
February 2 – A female suicide bomber attacks minutes after the President of Nigeria leaves an election rally in the city of Gombe resulting in at least one death and eighteen people injured. 
February 4 – Boko Haram militants reportedly raid the Cameroonian town of Fotokol in Cameroon's Far North Region with scores of people killed.  Also on February 4, the Chad Army claims to have killed 200 militants and lost nine soldiers while capturing the border town of Gamboru Ngala. 
February 6 – 2015 Niger raid - Boko Haram forces launch raids on the towns of Bosso and Diffa, both in
Niger , marking the first time that the group has attacked the country. The Chadian military assists the Nigerien Armed Forces in repelling the attack. 5 Nigeriens are killed while the government claims 109 Boko Haram militants are killed as well.
February 7 – Nigeria postpones its general election for six weeks to allow its armed forces to control parts of the country currently controlled by Boko Haram. 
February 9 – Boko Haram launch a raid on a prison in the town of Diffa in Niger. Authorities repel the attack. 
February 12 - The West African Allied Forces, led by Nigeria and supported by Cameroon, Chad, and Niger, invade the Sambisa Forest in Borno State, a stronghold of Boko Haram, killing scores of the insurgents.  Elsewhere, the town of Mbuta, 15 miles northeast of Maiduguri, is raided by Boko Haram, resulting in the deaths of 8 residents. A dozen people are also killed in a suicide blast at Biu, 100 miles southwest of Maiduguri. 
February 13 - Boko Haram militants attack Chad for the first time after 30 fighters crossed Lake Chad in four motorboats and attacked the village of Ngouboua . Chad recently joined Nigeria, Niger, and Cameroon in a military coalition against Boko Haram. 
February 14 – Boko Haram forces assault Gombe , the capital city of
Gombe State, for the first time. The Nigerian military repels the attack, although the militants managed to overrun a checkpoint on the edge of the city before retreating.  The attack coincides with the beginning of a Nigerian offensive to roll back Boko Haram forces around the northeast. 
February 15 – A suicide bomber kills 16 and wounds 30 in the Nigerian city of Damaturu. 
February 16 - Nigeria regains the key town of Monguno from Boko Haram. The town had previously fallen to the militants on January 25. 
February 18 - The Nigerian Army claims to have killed 300 militants in northeastern Nigeria. A warplane bombs a funeral ceremony in Niger killing 37 civilians.  The warplane remains unidentified, with the Nigerian government denying responsibility.
February 20 - Boko Haram militants kill 34 people in attacks across Borno State, 21 from the town of Chibok. 
February 21 - Nigerian army retakes
Baga, which had fallen to Boko Haram on January 3. 
February 22 - A suicide bomber kills five and wounds dozens outside a market in Potiskum . 
February 24 - Two suicide bombers kill at least 27 people at bus stations in Potiskum and Kano . 
February 24 - Chadian soldiers kill over 200 Boko Haram fighters in a clash near the town of Gambaru, close to Nigeria's border with Cameroon. One Chad Army soldier is killed and nine are wounded. 
February 26 - At least 35 people are killed in two attacks targeting the cities of Biu and Jos.
February 28 - Two female suicide bombers kill up to four civilians near Damaturu. 
March 2 - A senior military officer claims that 73 Boko Haram militants disguised as herders were killed near Kondunga town in Borno State. In addition, the Chadian military recaptures the town of Dikwa, also in Borno State.
March 7 - Five suicide bomb blasts leave 54 dead and 143 wounded in
Maiduguri.  After the explosions, Boko Haram formally declares allegiance to Islamic State. 
March 8 - Forces from Niger and Chad launch a ground and air offensive against Boko Haram Islamist militants in northeastern Nigeria. 
March 9 - Chadian and Nigerien forces retake the towns of Malam Fatouri and Damasak in northeastern Nigeria. 
March 13 - The Nigerian government admits to using foreign mercenaries in the fight against Boko Haram. 
March 16 - Nigeria, Chad, and Niger begin a battle to liberate Damasak from Boko Haram militants. 
March 17 - The Nigerian military reclaims the small city of Bama from Boko Haram. 
March 18 - Niger and Chad capture the city of Damasak following a successful battle.  A mass grave of 90 people is discovered in the city. 
March 21 - Chadian forces establish a presence in the border town of Gamboru following recent attacks there by Boko Haram gunmen that killed 11 people. 
March 27 - The town of Gwoza is recaptured by the Nigerian military. 
March 28 - Voters in Nigeria go to the polls for a general election. Gunmen kill at least 15 voters including an opposition house of assembly candidate for Dukku in Gombe. 
March 29 - Voting in the Nigerian general election is delayed for a second day due to delays and malfunctioning equipment. So far, 43 people have died in Boko Haram attacks. 
April 5 - Boko Haram militants dressed as preachers killed at least 24 citizens of Kwafaja Village in
Borno State, with some reports claiming that up to 50 were killed. 
April 9 - Members of Boko Haram entered the village of Dile in Borno State, killing 20. 
April 17 - While soldiers were evacuating the town of Gwoza in Borno State, militants entered the town and slit the throats of at least 12 townspeople. 
April 21 - As the military led efforts to evacuate the town of Baga in northern Nigeria, militants planted mines and fired rockets at military vehicles, killing eight soldiers and one civilian. 
April 24 - Last area controlled in Nigeria by Boko Haram's forces is in the Sambisa forest .
April 25 - Boko Haram retakes the town of Marte in Borno State, invading with tanks and over 2,000 troops.