Over 21,000 soldiers took part in the ground exercise Desert Rock V in conjunction with the Upshot-Knothole Grable shot.

The test series was notable as containing the first time an AFAP shell was fired (GRABLE Shot), the first two shots (both fizzles) by University of California Radiation Laboratory—Livermore (now Lawrence Livermore National Laboratory), and for testing out some of the thermonuclear components that would be used for the massive thermonuclear series of Operation Castle.

[2]: 200  RACER IV (as redesigned and proof-tested in the Simon test) was employed as primary for the ZOMBIE,[2]: 200  RAMROD and MORGENSTERN[2]: 318  devices.

Navy scientist Pauline Silvia conducted experiments during the tests, and would later be profiled in the 2010 documentary Atomic Mom.

37°05′56″N 116°05′36″W / 37.09889°N 116.09332°W / 37.09889; -116.09332 (Ray) "Hydride II" 37°08′18″N 116°07′07″W / 37.1383°N 116.1187°W / 37.1383; -116.1187 (Badger) 37°03′11″N 116°06′13″W / 37.053°N 116.1036°W / 37.053; -116.1036 (Simon) 36°48′00″N 115°55′44″W / 36.8°N 115.929°W / 36.8; -115.929 (Encore) 37°02′25″N 116°01′34″W / 37.0402°N 116.0261°W / 37.0402; -116.0261 (Harry) 36°42′15″N 115°58′26″W / 36.70428°N 115.97387°W / 36.70428; -115.97387 (Launch_Grable), elv: 950 + 5 m (3,117 + 16 ft);Detonation over NTS 36°47′35″N 115°54′56″W / 36.793°N 115.9156°W / 36.793; -115.9156 (Grable) 37°05′15″N 116°01′09″W / 37.0875°N 116.0192°W / 37.0875; -116.0192 (Climax)