Revealed: US spy operation that manipulates social media (2011)(theguardian.com)
theguardian.com
Revealed: US spy operation that manipulates social media (2011)
http://www.theguardian.com/technology/2011/mar/17/us-spy-operation-social-networks?CMP=share_btn_fb
I'd guess that the military is a latecomer to this game, and that corporations, political campaigns and activist groups have been doing this for years.
"He said none of the interventions would be in English, as it would be unlawful to 'address US audiences' with such technology, and any English-language use of social media by Centcom was always clearly attributed."
There are plenty of people inside the U.S. who read web content in languages other than English.