Sgt Eugene B. O'Brien flew 35 missions, from 08/01/1944, mission #120, to 11/26/1944, mission #173. He served as a Togglier.
Sgt O'Brien served with the following crewman: 1st Lt James K. Billman, Sgt Charles T. Bunn, 1st Lt Estel G. Burns, 2nd Lt Arther Gray Jr., T/Sgt John Gruchawka, 2nd Lt Bernard R. Hodowski, S/Sgt Buddy N. Keith, S/Sgt Eugene P. Klingbiel, 1st Lt Edward A. Lahey Jr., S/Sgt Duane A. Lamoureaux, S/Sgt Juan C. Lopez, Capt Charles T. Maxwell, S/Sgt Joseph A. McGrath, 1st Lt Locien P. McLeod, S/Sgt Wallace G. Minor, S/Sgt John A. Punte, S/Sgt Marion E. Searcy, S/Sgt Donald M. Swope, S/Sgt Robert L. Thomas, 2nd Lt David F. Tomkins, S/Sgt James R. Weatherman, S/Sgt Luther B. Welborn, T/Sgt Adam E. Will and S/Sgt Alfred R. Zaragoza