The bloodshed in the northeastern part of the country is partly the result of failures by the Nigerian military, analysts say.
Pentagon says targeting of the unidentified militant "was done precisely and accurately.”
The troops will stay at the Langley Transit Center, which was developed in a secluded area at Joint Base Langley-Eustis in Virginia.
The decision speaks to a larger issue: Reassuring the troops and families involved that they will be OK.
A general said Friday that the Defense Department's protocols for the disease 'we think exceed' the standard set by the Centers for Disease Control and Prevention.
It will take until late November or early December to complete all 17 treatment units the U.S. has planned in Liberia, Army says.
The confusion came out of a news conference at the Pentagon, and underscored the sensitivities to up to 4,000 U.S. service members deploying to western Africa.
General overseeing the operation says only a small percentage of the 4,000 troops being deployed will have direct contact with those suspected of having Ebola.
The bulk of the force comes from the U.S. Army.
The move was made by senior Army leaders as the Pentagon grappled with a string of incidents in which senior officers were accused of misconduct.