January 2 – 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 rollback 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.
June 12 – Several days of nighttime raids on six remote villages that left at least 37 people dead in Northeastern Nigeria.
June 16 – Twin Suicide Bomb attacks in Chad capital – twin suicide bombings blamed on Boko Haram jihadists killed 24 people and wounded more than 100 in the first such attacks in Chad’s capital N’Djamena. Monday’s attacks, which targeted the police headquarters and a police academy, were the first in the capital.
June 17 – Chad Bans Burqas and Tinted Cars – Chad has banned people from wearing the full-face veil, following two suicide bomb attacks on Monday. They also banned vehicles with tinted windows.
June 22 – Maiduguri Mosque Bombing – 30 killed at crowded mosque by 2 young female suicide bombers. Boko Haram marks the start of Ramadan by targeting a mosque that they see as falling short in following ‘The Prophet’. The second teen appeared to run away and blew up further away, killing only herself, eyewitnesses said.
July 1–2 – July Mosque Massacres — Boko Haram militants attacked multiple mosques between July 1 and 2. Forty-eight men and boys were killed on the 1st at one mosque in Kukawa. Seventeen were wounded in the attack. Ninety-seven others, mostly men, were killed in numerous mosques on the 2nd, with a number of women and young girls killed in their homes. An unknown number were wounded.
July 5 – A suicide bomber attacks a church in the Potiskum area of Nigeria’s Yobe State, killing five.
July 6 – Two bomb attacks on the central Nigerian city of Jos have left at least 44 people dead.
November 17 – A blast in the northeastern Nigerian city of Yola on Tuesday night tore through a marketplace, killing 32 people and wounding 80 others.