Operation Flintlock was the 31 January 1944 invasion of Kwajalein Atoll in the Marshall Islands. This attack sank a large number of Japanese ships and stripped the air base at Truk of its offensive potential. With Truk neutralized, it could be bypassed, forgoing a costly invasion. Kwajalein fell on 7 February after stiff Japanese resistance. See Operation Elkton.
Operation Flintlock was a series of forty nuclear tests conducted with one exception at the Nevada Test Site. These tests followed Whetstone and were in turn followed by Latchkey.
The Red Hot test was notable for the release of one million curies of radioactivity which drifted as far as eastern Iowa. The individual test shots were:
| Test Name | Date | Location | Yield | Note
|
|---|---|---|---|---|
| Bronze | 23 July 1965 | Nevada Test Site | about 60 kilotons | |
| Mauve | 6 August 1965 | Nevada Test Site | about 18 kilotons | |
| Centaur | 27 August 1965 | Nevada Test Site | <20 kilotons | |
| Screamer | 1 September 1965 | Nevada Test Site | about 12 kilotons | |
| Charcoal | 10 September 1965 | Nevada Test Site | 20-200 kilotons | |
| Elkhart | 17 September 1965 | Nevada Test Site | <20 kilotons | |
| Longshot | 29 October 1965 | near Amchitka, Alaska | 80 kilotons | |
| Sepia | 12 November 1965 | Nevada Test Site | <20 kilotons | |
| Corduroy | 3 December 1965 | Nevada Test Site | <20 kilotons | |
| Emerson | 16 December 1965 | Nevada Test Site | <20 kilotons | |
| Buff | 16 December 1965 | Nevada Test Site | about 36 kilotons | |
| Maxwell | 13 January 1966 | Nevada Test Site | <20 kilotons | |
| Lampblack | 18 January 1966 | Nevada Test Site | about 36 kilotons | |
| Dovekie | 21 January 1966 | Nevada Test Site | <20 kilotons | |
| Plaid II | 3 February 1966 | Nevada Test Site | about 32 kilotons | |
| Rex | 24 February 1966 | Nevada Test Site | 19 kilotons | |
| Red Hot | 5 March 1966 | Nevada Test Site | <20 kilotons | |
| Finfoot | 7 March 1966 | Nevada Test Site | <20 kilotons | |
| Clymer | 12 March 1966 | Nevada Test Site | <20 kilotons | |
| Purple | 18 March 1966 | Nevada Test Site | <20 kilotons | |
| Templar | 24 March 1966 | Nevada Test Site | <20 kilotons | Operation Plowshare |
| Lime | 1 April 1966 | Nevada Test Site | <20 kilotons | |
| Stutz | 6 April 1966 | Nevada Test Site | <20 kilotons | |
| Tomato | 7 April 1966 | Nevada Test Site | <20 kilotons | |
| Duyea | 14 April 1966 | Nevada Test Site | 70 kilotons | |
| Pin Stripe | 25 April 1966 | Nevada Test Site | about 4 kilotons | |
| Traveler | 4 May 1966 | Nevada Test Site | <20 kilotons | |
| Cyclamen | 5 May 1966 | Nevada Test Site | 12 kilotons | |
| Chartreuse | 6 May 1966 | Nevada Test Site | 73 kilotons | |
| Tapestry | 12 May 1966 | Nevada Test Site | <20 kilotons | |
| Piranha | 13 May 1966 | Nevada Test Site | about 100 kilotons | |
| Dumont | 19 May 1966 | Nevada Test Site | about 190 kilotons | |
| Discus Thrower | 27 May 1966 | Nevada Test Site | 22 kilotons | |
| Pile Driver | 2 June 1966 | Nevada Test Site | 62 kilotons | |
| Tan | 3 June 1966 | Nevada Test Site | about 140 kilotons | |
| Puce | 10 June 1966 | Nevada Test Site | <20 kilotons | |
| Double Play | 15 June 1966 | Nevada Test Site | <20 kilotons | |
| Kankakee | 15 June 1966 | Nevada Test Site | <20 kilotons | |
| Vulcan | 4 May 1966 | Nevada Test Site | 25 kilotons | Operation Plowshare |
| Halfbreak | 30 June 1966 | Nevada Test Site | 365 kilotons |