The returning soldiers are being kept in a controlled monitoring area at Joint Base Lewis-McChord in Washington for 21 days.
During the monitoring period, the soldiers will not have physical contact with family members or other non-medical personnel, but they will have phone and email access to their friends and families.
The soldiers were part of a military program that includes units from the Active Army, Army Reserve and Army National Guard. Those who returned this week were part of a group of 150 soldiers from the 615th Engineer Company, 52nd Engineer Battalion who departed in November from Fort Carson, Colorado.
About 50 soldiers have remained in West Africa to provide assistance.