"It's going to be a limited period of time, but I don't have a particular deadline [for withdrawal]," Cook told reporters at a press briefing at the Pentagon.
U.S. defense officials revealed the deployment on May 6, marking the first time in more than a year that the U.S. military has sent troops into Yemen.
In March 2015, the U.S. evacuated about 125 special operations troops amid the expanding civil war between government loyalists backed by a Sunni Arab coalition and Houthi rebels supported by Iran.
Hadrami elite forces tightly guard Mokala City from Al-Qaeda by creating check-points in Yemen on May 2, 2016. (Photo by Ibrahim Badawi / RoverImages / Pacific Press) *** Please Use Credit from Credit Field ***
Photo Credit: Ibrahim Badawi, Pacific Press/Sipa USA
Amid the chaos of Yemen's civil war, militants with al-Qaida in the Arabian Peninsula seized the port city last year. With looted bank money and oil exports, AQAP transformed Yemen's southern coastline into a wealthy ministate.
The U.S. is supporting a coalition led by the United Arab Emrites, a Sunni Gulf Arab ally, to push AQAP out of the port city.
AQAP forces have mostly withdrawn from the port city and a local airport there reopened Sunday for the first time in a year, according to local report.
In addition to the small team of U.S. forces on the ground, the U.S. military is also providing the UAE military with intelligence support, advice and assistance with operational planning, maritime interdiction and security operations, medical support and aerial refueling, defense officials said.
Andrew Tilghman is the executive editor for Military Times. He is a former Military Times Pentagon reporter and served as a Middle East correspondent for the Stars and Stripes. Before covering the military, he worked as a reporter for the Houston Chronicle in Texas, the Albany Times Union in New York and The Associated Press in Milwaukee.