Commentary
As U.S. troops arrive in a bold counterterrorism mission in Nigeria, it’s important to know that for more than a decade, Africa’s most populous nation has stood on the front lines of a brutal and evolving terror campaign.

As U.S. troops arrive in a bold counterterrorism mission in Nigeria, it’s important to know that for more than a decade, Africa’s most populous nation has stood on the front lines of a brutal and evolving terror campaign.