About 100 U. S. troops plus equipment have arrived in Nigeria to help train soldiers in the West African country as the government fights against Islamic militants and other armed groups, the Nigerian military announced Monday.

The US Army's attempt to catch up on drone warfare is teaching soldiers what it feels like to be hunted. The Unmanned Advanced Lethality Course is designed to help the US Army close gaps exposed by conflicts like Ukraine, where cheap, small drones have been reshaping how soldiers fight and survive, by teaching students how to operate small drones and understand how lethal they can be.