The Pentagon has announced that US Navy Secretary John Phelan is leaving his post with immediate effect, marking another sudden leadership change within the US defense establishment. The brief statement, issued by Pentagon spokesperson Sean Parnell, did not provide a clear reason for the abrupt departure.

Phelan, the Navy’s top civilian official, exits at a time of heightened geopolitical tensions, particularly as US naval forces play a central role in operations linked to the Middle East, including enforcement activities in strategic waters.

Following his departure, Navy Undersecretary Hung Cao has been appointed as acting secretary, ensuring continuity in leadership during a critical period.

While officials have not publicly disclosed the reasons behind the move, reports suggest internal disagreements within the Pentagon and concerns over policy direction may have contributed to the decision.

Phelan’s exit is part of a broader pattern of leadership reshuffles within the Department of Defense in recent weeks, raising questions about stability at the top levels of the US military during ongoing global tensions.