The U.S. Navy on Monday became the third branch of the military to no longer have a Senate-confirmed leader for the first time in history, as a Republican senator continues to block military nominations.

WASHINGTON, Aug 14 (Reuters) - The U.S. Navy on Monday became the third branch of the military to no longer have a Senate-confirmed leader for the first time in history, as a Republican senator continues to block military nominations.

Retiring Chief of Naval Operations Admiral Mike Gilday gave up command on Monday. The Navy, Army and Marine Corps are now all without a confirmed leader.