If confirmed by the Senate, Milley would succeed Marine Gen. Joseph Dunford as chairman of the Joint Chiefs of Staff, the pinnacle of a military career.
Milley served as a Green Beret and commanded troops in Afghanistan.
President Donald Trump has indicated he will make an announcement at Saturday's Army-Navy game and no one in the Pentagon seems to have the foggiest idea what he is talking about.
He hinted then that he would have an announcement related to the Joint Chiefs of Staff, when speaking with reporters.
Milley who holds degrees from Princeton University and Columbia University, is known to be liked by Trump.
Dunford, a former commandant of the Marine Corps, is expected to serve out his term as Joint Chiefs chairman, which ends next October 1.
Milley was also involved in the launch of Army Futures Command which is tasked with helping modernize the service.
Milley made the early decision to charge Bergdahl with desertion and misbehavior before the enemy. He is a former commander of the 82nd Airborne Division and the 5th Special Forces Group.
Gen. Joseph Dunford, the chairman of the Joint Chiefs of Staff, will be done his second term in 2018.
Although Kelly was not serving as Trump's chief of staff during the time he fired former FBI Director James Comey, Mueller's team nonetheless wanted him to answer some questions about what he remembered about key events surrounding the firing. Previous chairmen served two two-year terms if they were re-nominated. Dunford is expected to serve out his term.