Vincent registered for the draft in New York City, NY on 7 September 1943 and was inducted into the Army in that same city on 5 November 1943.

A parachutist volunteer, Pvt Castro was assigned to Company G, 508th PIR.

On 5 October 1944 he was promoted to Pfc.

Then, just two weeks later, on 19October Pfc Castro was wounded in action in Holland and evacuated.

On 31 January 19445, still hospitalized, Pfc Castro was transferred to the hospital's detachment of patients.  He did not return to the regiment.

 Pfc Castro (line 3) was aboard the SS Queen Mary, when arrived in New York, NY from Greenock, Scotland on 5 March 1945.  He is listed as having paralysis of the median nerve, from a "GSW" (gun shot wound) with  penetration of the right forearm

His military decorations include the Purple Heart and Bronze Service Arrowhead device awarded for the Holland campaign and Airborne operations.

Vincent died on 7 August 1963 and is buried in Section H, Grave 1206, Long Island National Cemetery, East Farmingdale (Suffolk), NY