The Battle of the Trebia occurred on the left bank of the Trebbia River.
Necessary Evil , also referred to as Plane # 91 , was the name of Boeing B-29-45-MO Superfortress 44-86291 , -LRB- Victor 91 -RRB- , participating in the atomic bomb attack on Hiroshima on August 6 , 1945 .. Boeing B-29-45-MO Superfortress. Boeing B-29-45-MO Superfortress. Victor 91. Unit identification aircraft markings#XXI Bomber Command. the atomic bomb attack on Hiroshima. Atomic bombings of Hiroshima and Nagasaki. Assigned to the 393d Bomb Squadron , 509th Composite Group , it was used as a camera plane to photograph the explosion and effects of the bomb , and to carry scientific observers .. 393d Bomb Squadron. 393d Bomb Squadron. 509th Composite Group. 509th Composite Group. At the time of the attack the plane was not named and was known only by its 393d Victor number .. The mission was flown by crew B-10 , with Captain George Marquardt as aircraft commander .. The crew regularly assigned to this airplane in turn flew on the Nagasaki mission on August 9 , 1945 , in another B-29 ; Big Stink , though without their aircraft commander , who was ill .. Nagasaki. Nagasaki, Nagasaki. Big Stink. Big Stink ( B-29 )