Summary of U.S. Nuclear Test Series

From 1945 to 1963 the U.S.A. conducted an extensive campaign of nuclear tests, generally grouped into the 20 test "series" summarized in the table below.

Test SeriesYearLocationNumber of TestsNumber of Personnel*
Project Trinity1945U.S.A.1164
Operation Crossroads1946Pacific240,112
Operation Sandstone1948Pacific311,782
Operation Ranger1951U.S.A.5266
Operation Greenhouse1951Pacific47,590
Operation Buster-Jangle1951U.S.A.77,812
Operation Tumbler-Snapper1952U.S.A.88,710
Operation Ivy1952Pacific211,650
Operation Upshot-Knothole1953U.S.A.1118,000
Operation Castle1954Pacific612,700
Operation Teapot1955U.S.A.148,700
Operation Wigwam1955Pacific16,800
Operation Redwing1956Pacific1711,350
Operation Plumbbob1957U.S.A.2413,300
Operation Hardtack I1958Pacific3416,000
Operation Argus1958Atlantic34,500
Operation Hardtack II1958U.S.A.191,650
Operation Dominic I1962Pacific3622,600
Operation Dominic II1962U.S.A.42,900
Plowshare Program1961-1962U.S.A.27**

* These approximate numbers represent only Department of Defense personnel.

** Numbers for Plowshare not available.