As the Missouri National Guard prepared to deploy to help quell riots in Ferguson, Missouri ... the guard used highly militarized words such as enemy forces" and "adversaries" to refer to protesters, according to documents obtained by CNN. The National Guard's language, contained in internal mission briefings obtained through a Freedom of Information Act request, is intensifying the concerns of some who objected to the police officers' actions ... after the August 9 shooting of unarmed black teenager Michael Brown by city police officer Darren Wilson. A grand jury declined to indict Wilson in the case. "It's disturbing when you have what amounts to American soldiers viewing American citizens somehow as the enemy," said Antonio French, an alderman in St. Louis. The documents reveal that the Missouri guard was especially concerned that "adversaries" might use phone apps and police scanners to expose operational security. A document titled "Operation Show-Me Protection II," which outlines the Missouri National Guard's mission in Ferguson, listed players on the ground deemed "Friendly Forces" and "Enemy Forces." Among groups characterized as hate groups were ... "General Protesters." In addition to analyzing the threat general protesters could pose to soldiers, the National Guard also briefed its commanders on their intelligence capabilities so they could "deny adversaries the ability to identify Missouri National Guard vulnerabilities," the mission set states.