Lawmakers, including John McCain, have criticized the Trump administration for not revealing details about the mission or the killings.
Militant groups including ISIS and Al-Qaeda are active across Africa.
Human remains from South Africa indicate first humans diverged up to 350,000 years ago.
The base was established in Djibouti in July alongside growing Chinese influence in Africa.
The Nigerian military has been accused of arbitrary arrests and executions of people suspected of being members of the Islamist group.
Chad has been fighting Boko Haram and Al-Qaeda for years, but Trump says it's not playing ball with Washington.
Opposition activists said hundreds were killed in a stampede allegedly provoked by security forces at the Irreecha festival in 2016.
Mali has played host to a raft of extremist groups in recent years but people's reasons for joining are often the same.
China's new military base is just a few miles from the only permanent U.S. outpost in Africa.
Saudi Arabia has announced plans to expel migrants working or living illegally in the kingdom.
The military capability of the militant herdsmen has become increasingly sophisticated.
Should we be saving the rhinos or the poachers driving them to extinction? The answer is not as easy as you might think.
Set to open next month in Somalia, this is the second Turkish overseas military installation, after a base in Qatar.
The base is in Djibouti, where the United States has its only permanent military base in Africa.
A young Saudi woman posted a video of herself wearing un-Islamic clothing in public.
The baboon survived the shock, according to authorities.
The capital, Asmara, is now a world heritage site. But will more people visit Africa's most secretive state?
China says the military move is one of peacekeeping, not aggression.