According to the first official tally of these assaults, the West African state of Benin, which is threatened by the expansion of Islamist violence from the Sahel, has been the target of roughly 20 attacks.

The country borders Mali, Niger and Burkina Faso, where a years-long jihadist campaign has claimed thousands of lives and driven more than two million people from their homes.

A posting Thursday on the government website said, “Nearly 20 or so attacks by armed groups against Benin, and the army has buried around 10 of its soldiers.”

The report was an account of a ceremony in the capital Cotonou for five servicemen killed in an assault in the north last month.

“There is no longer any doubt, Benin is at war against terrorism,” Vice President Mariam Chabi Talata told the ceremony, although the report made no mention of the term jihadist.

In another attack this month in northern Togo, eight soldiers and 15 attackers died in what the Lome government called the country’s first deadly “terrorist” attack.

Benin’s first known fatal attack was last December, in which two soldiers were killed near the troubled frontier with Burkina.

The government responded by announcing increased military deployment in the north to protect the border.

Armed incursions by jihadists affiliated to Al-Qaeda and the Islamic State (IS) from difficult Sahel countries have recently hit Ghana and the Ivory Coast, raising fears of a southern push from the Sahel to the Gulf of Guinea.