Boko Haram - the Islamic group in West Africa that is infamous for kidnapping hundreds of schoolgirls - again has proven its strength, this time by capturing a heavily guarded military base in northern Nigeria.

Jennifer Griffin reported on "Happening Now" today that this comes at a terrible time, as the U.S. military's role in Nigeria has recently changed.

Griffin explained that in the past month, the Nigerian government unexpectedly canceled a U.S. counterterrorism training mission designed to help in the fight against Boko Haram.

The U.S. State Department issued a statement in response, saying, "We regret premature termination of this training, as it was to be the first in a larger planned project that would have trained additional units with the goal of helping the Nigerian Army build capacity to counter Boko Haram."

Griffin said they reportedly cut ties with the U.S. military due to the State Department's unwillingness to sell Cobra attack helicopters to the Nigerian government.

She explained there were concerns that they could not maintain the helicopters and that they were not serious about going after Boko Haram.

In October, Boko Haram's leader said that the nearly 300 girls who were abducted by the group in April have been married off or sold into sex slavery.

Griffin reported that the U.S. military has been stymied from finding the missing girls because it does not have a reliable partner in the corrupt Nigerian military.

"The effort to counter Boko Haram is not moving forward the way it is against Al-Shabaab, for instance, in Somalia, where the Somali government is a willing partner."

Watch the clip above.