In November 1941, prior to the Japanese Attack on Pearl Harbor, Brown was appointed operations officer within Amphibious Force, Pacific Fleet under Major General Clayton Barney Vogel.

Brown followed his superior in July 1943, when he was relieved by Lieutenant Colonel Edward W. Snedeker and was transferred back to the United States.

[1] He was subsequently appointed chief of staff of Fleet Marine Force under general Holland M. Smith in San Diego, California.

[1] Brown was appointed assistant chief of staff of planning section of Fleet Marine Force, Pacific under Lieutenant General Holland M. Smith in October 1944.

He participated in the planning of the Iwo Jima operation and during the battle served simultaneously as chief of staff of Expeditionary Troops, Fifth Fleet again under General Smith.

Upon his retirement from the military, Brown resided in White Stone, Virginia, and died of cancer on March 10, 1971, in Portsmouth Naval Hospital.

[6] Here is the ribbon bar of Major General Dudley S. Brown:[1] This article incorporates public domain material from websites or documents of the United States Marine Corps.