Encyclopedia of WW3
U.S. Nuclear War Plans (1945-Present)

(Created 2009)
(Revised 8 April 2024)

Sources/Bibliography

SIOP Plan

Effective
Dates of Coverage

SIOP-62
Base Plan

1 April 1961
to
31 July 1962

SIOP-63
Base Plan

1 August 1962
to
14 February 63

SIOP-63
Revision 1

15 February 1963
to
14 April 1963

SIOP-63
Revision 2

15 April 1963
to
30 June 1963

SIOP-63
Revision 3

1 July 1963
to
31 August 1963

SIOP-63
Revision 4

1 September 1963
to
31 December 1963

SIOP-64
Base Plan

1 January 1964
to
31 March 1964

SIOP-64
Revision 1

1 April 1964
to
30 June 64

SIOP-64
Revision 2

1 July 1964
to
30 September 1964

SIOP-64
Revision 3

1 October 1964
to
31 December 1964

SIOP-64
Revision 4

1 January 1965
to
31 March 1965

SIOP-64
Revision 5

1 April 1965
to
30 June 1965

SIOP-64
Revision 6

1 July 1965
to
9 November 1965

SIOP-64
Revision 7

10 November 1965
to
31 March 1966

SIOP-64
Revision 8

1 April 1966
to
30 June 1966

SIOP-4
Base Plan

1 July 1966
to
31 December 1966

SIOP-4
Revision A

1 January 1967
to
30 June 1967

SIOP-4
Revision B

1 July 1967
to
31 December 1967

SIOP-4
Revision C

1 January 1968
to
30 June 1968

SIOP-4
Revision D

1 July 1968
to
31 December 1968

SIOP-4
Revision E

1 January 1969
to
30 June 1969

SIOP-4
Revision F

1 July 1969
to
31 December 1969

SIOP-4
Revision G

1 January 1970
to
30 June 1970

SIOP-4
Revision H

1 July 1970
to
31 Dec 1970

SIOP-4
Revision I

1 January 1971
to
30 June 1971

SIOP-4
Revision J

1 July 1971
to
31 December 1971

SIOP-4
Revision K

1 January 1972
to
30 June 1972

SIOP-5
Base Plan

1 January 1976

SIOP-6
Base Plan

1 October 1983

SIOP-6
Revision F

1 January 1989

SIOP-6
Revision G

1 October 1990

SIOP-6
Revision H

1 October 1991

SIOP-92
Base Plan

1 October 1991

SIOP-93
Base Plan

1 June 1992

SIOP-94
Base Plan

1 October 1993

SIOP-95
Base Plan

1 October 1994

SIOP-96
Base Plan

1 October 1995

SIOP-97
Base Plan

1 October 1996

SIOP-98
Base Plan

1 October 1997

SIOP-99
Base Plan

1 October 1998

SIOP-00
(presumably)

1 October 1999
(presumably)

SIOP-01
(presumably)

1 October 2000
(presumably)

SIOP-02
(presumably)

1 October 2001
(presumably)

OPLAN 8044-03
Base Plan

March 2003

OPLAN 8044-05
Base Plan

October 2004