1941-1945:
On 29 March 1941, he receives his Master of Sail Vessel license for “Any Ocean.”

On 2 July 1941, he is commissioned as lieutenant (jg) of the United States Navy Reserve. With the outbreak of war in December 1941, he is ordered to Australia where he coordinates intelligence activities.

	L. Ron Hubbard during World War II served as a lieutenant in the US Navy.

Returning to the United States in March, 1942 he takes command of a convoy escort vessel in the Atlantic, then a subchaser in the Pacific. He also serves as an instructor and chief navigation officer, and is selected to Princeton University’s Military Government School. In early 1945, while recovering from war injuries at Oak Knoll Naval Hospital, Mr. Hubbard conducts a series of tests and experiments dealing with the endocrine system. He discovers that, contrary to long-standing beliefs, function monitors structure. With this revolutionary advance, he begins to apply his theories to the field of the mind.

1946:
After discharge from the US Navy in February 1946, Mr. Hubbard returns to writing, although his primary thrust continues to be the development of a means to better the condition of man. He also continues to write to help support this research.