Which terrorist group has claimed the most lives in Nigeria?

Boko Haram remains Nigeria’s deadliest terrorist group with a recorded increase in terrorist activity – mainly targeted at civilians – by 25% from 2019. The country is the third most impacted by terrorism in the world. But total deaths from terrorism in Nigeria fell to 1,245 in 2019, a 39% decrease from the prior year. Terror-related incidents also fell by 27%, marking the lowest level of terrorist violence in Nigeria since 2011.