base resulted in a battle that lasted over an hour, it is unknown if there were any casualties in the assault, a local pro-government militia said the military had sustained some casualties, this attack marks Boko Haram's first major gain since 2015. On 8 September, ISWAP fighters managed to capture the town of Gudumbali in central Borno, marking their first major gain in nearly two years. The next day, ISIL's West Africa Province released a video showing footage from combat with the Nigerian Army in the area. In late December, ISWAP launched another offensive and captured Baga in northeastern Borno State. In November, fighting in and around Lake Chad intensified, beginning the Chad Basin campaign, which lasted until February 2020. On 18 November, ISWAP fighters attacked a military base in Metele, Borno, killing at least 118 soldiers while at least 153 others were missing after the attack, the militants also seized tanks, armored vehicles, artillery, weapons, and ammunition. 2019 Barnawi's ISWAP launched a major offensive in January, attacking several Nigerian military bases, including those at Magumeri and Gajiram. Insurgents also overran and destroyed the IDP town of Rann, displacing its inhabitants yet again. The destruction of Rann was initially attributed to ISWAP, but Shekau's Boko Haram later claimed responsibility. Three Boko Haram suicide bombers killed 30 people in Konduga, Borno, on 16 June. Boko Haram shot dead at least 65 people in Nganzai, Borno, who were walking home from a funeral on 27 July. 2020 On 6 January, Boko Haram bombed a market in Gamboru, Borno, killing at least 38 people. On 9 February, they killed at least 30 people in Auno, Borno. On 23 March, they carried out massacres against the Chadian and Nigerian armies. The Chadian Defense Minister, Mahamat Abali Salah, announced on 31 March the launch of “Operation Boma's Wrath”, in response to Boko the 23 March massacres. The operation's target is to wipe out the Boko Haram remnants around Lake Chad, the operation is named after the island where Boko Haram launched a seven-hour assault, that Chadian President Idriss Déby said, was the worst the country's military had ever suffered. On 9 June, Boko Haram killed 81 villagers in a mass shooting in Gubio, Borno. On 13 June, Boko Haram killed at least 20 soldiers in Monguno and more than 40 civilians in Nganzai. On 29 July, convoy of the Borno governor, Babagana Zulum was attacked