WASHINGTON — Amid a surge of Islamic militancy in North Africa, a team of fewer than 50 U.S. special operations troops with a single helicopter arrived at a remote base in western Tunisia last month.
Their mission: train Tunisian troops in counterterrorism tactics.
The operation was one of dozens of U.S. military deployments in Africa over the last year, often to tiny and temporary outposts. The goal is to leverage American military expertise against an arc of growing instability in North Africa and many sub-Saharan countries, from Mali in the west to Somalia in the east.
The small-scale operations by the Pentagon’s 6-year-old Africa Command reflect an effort to avoid provoking anti-U.S. militants in the region — and wariness of getting drawn into new conflicts after 13 years of war in Iraq and Afghanistan. U.S. commanders for Africa face tight limits on the forces and equipment they can put on the ground or in the air, despite responsibility for a vast geographic area.
Classified guidance approved by the White House last fall called for the Pentagon to “deter” terrorist attacks from Africa on U.S. territory, facilities or allies without creating a large military footprint, according to officials who spoke on condition of anonymity to discuss classified material.
Based in Stuttgart, Germany, Africa Command has only about 2,000 military and civilian personnel assigned to coordinate U.S. defense programs in about 38 African countries, although 5,000 or more U.S. troops are frequently on the continent for operations and training missions.
It’s still a tiny fraction of the combined forces under Central Command, which oversees the war in Afghanistan and bases in the Middle East, or under Pacific Command, which has become a Pentagon priority since the White House announced a strategic “rebalancing” of forces to Asia in 2012.
U.S. military commanders working in Africa thus rely on small teams of special operations troops, U.S.-trained forces from friendly African countries, and European allies, especially France, that have stepped up their own military presence and operations.
In Niger, for example, U.S. and French air forces based at an airport in Niamey, the capital, are flying unarmed Reaper drones to gather intelligence.
They conduct aerial surveillance across several Saharan countries where some members of the Tuareg minority group have joined Islamist warlords and farther south in Nigeria, U.S. military officers say.
Three violent extremist organizations are the chief U.S. concern. Al-Qaida in the Islamic Maghreb is active in northern and western Africa, especially Mali, and is considered the greatest threat to Americans.
But U.S. troops also are advising the Nigerian army as it establishes a special operations command to combat Boko Haram — which has launched hundreds of violent attacks across Muslim-dominated northern Nigeria — and supporting African Union troops against extremist al-Shabab militants in Somalia.
The U.S. command acknowledged in January that it had sent a small team of advisers to Somalia in December, the first time American troops have been stationed there since militia fighters in Mogadishu, the capital, shot down two helicopters and killed 18 U.S. servicemen in the 1993 “Black Hawk Down” incident.
“Most of the countries we’re dealing with don’t want a large U.S. presence,” said Army Lt. Col. Robert E. Lee Magee, the commander of a 130-soldier “crisis response” unit stationed in Djibouti, a tiny former French colony in the Horn of Africa, where the U.S. maintains its only major military base on the continent.
Known as the East Africa Response Force, Magee’s unit was formed after the September 2012 attacks on a U.S. diplomatic compound and nearby CIA base in Benghazi, Libya.
Africa Command was unable to send troops in time to help CIA and State Department security personnel fend off militants who stormed the compounds and left four Americans dead, including Ambassador J. Christopher Stevens.
If a U.S. diplomatic post in East Africa comes under attack or U.S. citizens need to be quickly evacuated, Magee said, his unit can deploy within 18 hours and up to 1,500 miles from Djibouti.
Another new quick reaction force of 550 Marines, stationed at an air base in Moron, Spain, is charged with responding to crises in North and West Africa, officials said.
Both units were sent to South Sudan in December to help evacuate Americans and guard the U.S. Embassy after fierce fighting broke out between rival armed factions.