Complex sentence: Whilst detached, he completed the senior course at the Naval War College, Newport, Rhode Island in June 1933, and from June 1934 until June 1936 again had duty in the Office of Naval Intelligence, this time as Head of the Far East Division.
Split into simpler sentences: Whilst detached, he completed the senior course at the Naval War College, Rhode Island in June 1933. From June 1934 until June 1936 again had duty in the Office of Naval Intelligence, this time as Head of the Far East Division.