was the trinity part of the manhattan project?
Yes
Trinity (nuclear test)
Trinity was the code name of the first detonation of a nuclear device. It was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project. 
what is trinity nuclear test? It was the code name of the first detonation of a nuclear device. when did the test start? July 16, 1945. did it have any other code name? No which organizations were involved in it? E-9 group,  National Safety Council, etc. what is the council about? It is a nonprofit, public service organization promoting health and safety in the United States of America. when was the council established? 1913 is there a month dedicated to it? Yes,  June where is the head office of the council? Itasca, Illinois
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Trinity (nuclear test) [SEP] Introduction
A rehearsal was held on May 7, 1945, in which of high explosive spiked with radioactive isotopes were detonated. The Gadget's detonation released the explosive energy of about . Observers included Vannevar Bush, James Chadwick, James Conant, Thomas Farrell, Enrico Fermi, Richard Feynman, Leslie Groves, Robert Oppenheimer, Geoffrey Taylor, Richard Tolman and John von Neumann.