I wondered about phony posters after the Snowden revelations. There was one or two that seemed “off”. The ones around the elections could be the opposition (dem’s)....or I guess they could be what this article suggests if the military sees an advantage of Obama staying in office.
The military does what the commander in chief tells them to do.
The top positions, such as the joint chiefs of staff, etc., are appointments by the president.
Do a little research on how generals get promoted to the highest positions in the military.