© Reuters/LUC GNAGO The opening ceremony of the U.S. sponsored Flintlock exercises at the site of the new French-backed international counter-terrorism academy in TocquevilleThe training program, known as Flintlock, will bring together more than 400 soldiers from across West Africa to bolster the skills of forces, some of which are under regular attack by armed groups linked to al Qaeda and the Islamic State.

Those not present included forces from Guinea and two countries worst-hit by Islamist violence, Mali and Burkina Faso. Military juntas have snatched power in those three countries since 2020, raising concerns about a return to West Africa’s post-colonial reputation as a “coup belt”.

Central to this year’s training is coordination between different forces fighting the same enemy.

“A main focus of Flintlock is information sharing. If we can’t communicate, we can’t work together,” said Admiral Jamie Sands, commander of the U.S. Special Operations Command Africa, at the opening ceremony.

Islamist militants roam across large areas of the Sahel, the arid band of terrain south of the Sahara Desert. Mali, Niger, and Burkina Faso have been overrun by attacks since 2015 that have killed thousands and uprooted more than 2 million people. Security experts say insurgents have infiltrated coastal countries including Benin and Ivory Coast.

The group’s ghost across poorly-policed borders, confounding a mosaic of local and international forces who have spent billions of dollars trying to eliminate the threat.

France has led the fight against the militants since 2013, but popular opposition to its intervention has grown. Last week it said it would leave Mali, moving instead to Niger.

Diplomats fear the exit of 2,400 French troops from Mali – the epicenter of the violence – could destabilize the region further.