[2] On April 23, 1918, Corcoran enlisted as a Private in the U.S. Coast Artillery, he was assigned to Fort Strong in Boston Harbor.
[2] On July 4, Corcoran was assigned to the Coast Artillery Officers Training Camp, Fort Monroe, Virginia and promoted to Lieutenant.
[2] Corcoran was later transferred to Fort McKinley, Portland, Maine and the 33rd Coast Artillery, Camp Abraham Eustis, Virginia.
[2][3] Corcoran wrote his graduate theses on the Departmental Layout of the Proposed store of a Coöperative Society.
[6] Corcoran died unexpectedly, at age 48, from pneumonia in a Boston, Massachusetts hospital on December 28, 1945.