Milley, who assumed his current post in August 2015, was testifying alongside acting Secretary of the Army and former democratic congressman, Patrick Murphy before the Senate Armed Services Committee.
Sen. Mike Lee (R., Utah) asked Milley about what the Army has done to better protect personnel and if the Army would consider letting soldiers carry their own weapons on bases.
"Such as recruiting stations, such as Chattanooga, the assessments are done by the local commanders ... and make a determination whether it was appropriate or not appropriate to arm them. So he delegated the authority in the assessment to the commanders, which is appropriate. Commanders should make those decisions because one size won’t fit all," Milley said.