In Iraq’s western Anbar province, more than 300 U.S. troops are posted at a base in the thick of a pitched battle between Iraqi forces, backed by tribal fighters, and well-armed Islamic State militants.
The militants, positioned at a nearby town, have repeatedly hit the base with artillery and rocket fire in recent weeks. Since the middle of December, the U.S.-led military coalition has launched 13 airstrikes around the facility.
U.S. troops have suffered no casualties in the attacks. But the violence has underlined the risks to American personnel as they fan out across Iraq as part of the expanding U.S. mission against the Islamic State, even as President Obama has pledged that U.S. operations “will not involve American combat troops fighting on foreign soil.” […]