In 2015, West African countries fought against the jihadist militant group Boko Haram which controlled large areas of northeastern Nigeria.

The group, whose name means 'western education is forbidden', had killed thousands and displaced millions in the years preceding 2015.

They made worldwide headlines in 2014 when they kidnapped 276 girls from a boarding school.

Tim O’Callaghan speaks to retired Brigadier General Sani Kukasheka Usman, who was director of public relations for the Nigerian army in 2015.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from the death of Adolf Hitler, the first spacewalk and the making of the movie Jaws, to celebrity tortoise Lonesome George, the Kobe earthquake and the invention of superglue.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: Eva Peron – Argentina’s Evita; President Ronald Reagan and his famous ‘tear down this wall’ speech; Thomas Keneally on why he wrote Schindler’s List; and Jacques Derrida, France’s ‘rock star’ philosopher.

You can learn all about fascinating and surprising stories, such as the civil rights swimming protest; the disastrous D-Day rehearsal; and the death of one of the world’s oldest languages.

(Photo: Nigerian soldiers hold a Boko Haram flag after liberating an area from their control in 2015. Credit: Reuters)