2015 West African offensive the military's advance. BBC analyst Tomi Oladipo called the victory a major milestone for Nigeria. Boko Haram had held the town since August 2014 when Nigerian troops abandoned the city. The victory came days after Chad President Idriss Deby criticized Nigerian forces for not pulling their weight in the fight against Boko Haram. On election day, Boko Haram militants killed 41 people, including a legislator, in an effort to disrupt voting. After Muhammadu Buhari defeated incumbent president Goodluck Jonathan in the election, the fight against Boko Haram continued. (Jonathan remained in power until May 29.) On April 8, a summit
Goodluck Jonathan George Washington University, although she later denied it. None of the corruption allegations against Jonathan have been proven in any law court. Since May 2015, the Muhammadu Buhari administration reportedly has been fighting corruption that was perpetrated under Jonathan. Some of the former political office holders and appointees that served under Jonathan, as well as party members, have been arrested on various corruption charges. It is alleged that some, including former Finance Minister Nenadi Usman, have returned part of the money they stole. None of these politicians have however been convicted of the alleged crimes. It remains unclear whether or