U.S. Periods of War
Barbara Salazar Torreon
Information Research Specialist
January 7, 2010
Congressional Research Service
7-5700
www.crs.gov
RS21405
CRS Report for Congress
P
repared for Members and Committees of Congress

U.S. Periods of War

Summary
Many wars or conflicts in U.S. history have federally designated “periods of war,” dates marking
their beginning and ending. These dates are important for qualification for certain veterans’
pension or disability benefits. Confusion can occur because beginning and ending dates for
“periods of war” in many nonofficial sources are often different from those given in treaties and
other official sources of information, and armistice dates can be confused with termination dates.
This report lists the beginning and ending dates for “periods of war” found in Title 38 of the Code
of Federal Regulations
, dealing with the Department of Veterans Affairs (VA). It also lists and
differentiates other beginning dates given in declarations of war, as well as termination of
hostilities dates and armistice and ending dates given in proclamations, laws, or treaties. This
report will be updated when events warrant. For additional information, see CRS Report
RL31133, Declarations of War and Authorizations for the Use of Military Force: Historical
Background and Legal Implications
.
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U.S. Periods of War

Contents
War Dates ................................................................................................................................... 1
Indian Wars................................................................................................................................. 1
Spanish-American War................................................................................................................ 1
Mexican Border Period ............................................................................................................... 2
World War I ................................................................................................................................ 2
World War I Against Germany............................................................................................... 2
World War I Against Austria-Hungary ................................................................................... 2
World War II ............................................................................................................................... 2
World War II with Germany .................................................................................................. 3
World War II with Japan........................................................................................................ 3
World War II with Italy ......................................................................................................... 4
World War II with Bulgaria ................................................................................................... 4
World War II with Hungary ................................................................................................... 4
World War II with Romania................................................................................................... 4
Korean Conflict .......................................................................................................................... 4
Vietnam Era ................................................................................................................................ 5
Tonkin Gulf Resolution......................................................................................................... 5
Conflicts in Lebanon 1982-1983 and Grenada 1983 .................................................................... 5
Persian Gulf War......................................................................................................................... 5
Current Conflicts in Afghanistan and Iraq.................................................................................... 6
Operation Enduring Freedom (OEF) ..................................................................................... 6
Operation Iraqi Freedom (OIF).............................................................................................. 6

Contacts
Author Contact Information ........................................................................................................ 7

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U.S. Periods of War

War Dates
Congress, usually through a declaration of war, has often been the first governmental authority to
designate the beginning date of a war or armed conflict. The President, or executive branch
officials responsible to him, through proclamation, or Congress, through legislation, have been
responsible for designating the war’s termination date.1 In some cases, later legislation is enacted
to extend these beginning and ending dates for the purpose of broadening eligibility for veterans’
benefits.2 This report notes the variations in the dates cited in the Code of Federal Regulations
(CFR) “periods of war” and those dates given in the declarations of war beginning and the
proclamations, laws, or treaties terminating such conflicts. Adding to the confusion, during World
War II, wars were declared and terminated with six individual combatant countries. Moreover,
armistice dates are also often confused with termination dates.3
Title 38, Part 3, Section 3.2 of the Code of Federal Regulations (CFR), dealing with the
Department of Veterans Affairs (VA), lists official beginning and termination dates for most war
periods from the Indian Wars to the present to be used in determining the availability of veterans’
benefits.4 The material below summarizes these dates. Where applicable, a summary of the
Department of Veterans Affairs official beginning and termination dates is provided followed by a
citation to the lettered CFR section. For some entries, this initial summary is followed by an
explanatory note or declaration, armistice, cease-fire, or termination dates cited by other official
sources.
Indian Wars
January 1, 1817, through December 31, 1898, inclusive. Service must have been rendered with
U.S. military forces against Indian tribes or nations. Code of Federal Regulations, 3.2 (a).
Spanish-American War
April 21, 1898, through July 4, 1902, inclusive. If the veteran served with the U.S. military forces
engaged in hostilities in the Moro Province, the ending date is July 15, 1903. The Philippine

1 For background on the War Powers Act and use of military force abroad, see the following CRS Report RL32267,
The War Powers Resolution: After Thirty-Four Years, CRS Report RL33532, War Powers Resolution: Presidential
Compliance
, and CRS Report RL32170, Instances of Use of United States Armed Forces Abroad, 1798-2008, all by
Richard F. Grimmett.
2 The American Legion also follows these dates closely in determining who is eligible for membership; the Veterans of
Foreign Wars has its own much more elaborate list of dates.
3 Armistice—“In International law, a suspension or temporary cessation of hostilities by agreement between belligerent
powers.” Department of Defense Dictionary of Military and Associated Terms. Joint Publication 1-02, Department of
Defense, April 12, 2001 (Washington: GPO, 2001), p. 32. See also the more detailed definition in the Parry and Grant
Encyclopaedic Dictionary of International Law
(New York: Oceana Publications, Inc., 1986), p. 30.
4 Title 38 of the CFR, titled “Pensions, Bonuses and Veterans’ Relief,” is not to be confused with Title 38 of the United
States Code,
titled “Veterans Benefits.” Laws enacted in each Congress are first collected as session laws, published in
the Statutes at Large for each session. These laws are then codified by subject and published in the United States Code.
The general guidance given by these laws results in the issuance of more detailed regulations to implement these laws.
Such regulations are first published in the Federal Register and are then codified by subject in the CFR.
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Insurrection and the Boxer Rebellion are included for the purposes of benefit determination under
this CFR section. Code of Federal Regulations, 3.2 (b).
Declared by an act of Congress April 25, 1898 (30 Stat. 364, ch. 189). An armistice signed August
12, 1898. Terminated by Treaty signed at Paris, December 10, 1898 (30 Stat. 1754), ratified and
proclaimed April 11, 1899.
Mexican Border Period
May 9, 1916, through April 5, 1917. In the case of a veteran who during such period served in
Mexico, on the borders thereof, or in the adjacent waters thereto. Code of Federal Regulations,
3.2 (h).
World War I
April 6, 1917, through November 11, 1918, inclusive. If the veteran served with the U.S. military
forces in Russia, the ending date is April 1, 1920. Service after November 11, 1918, and before
July 2, 1921, is considered World War I service if the veteran served in the active military, naval,
or air service after April 5, 1917, and before November 12, 1918. Code of Federal Regulations,
3.2 (c).
World War I Against Germany
Declared by Joint Resolution of Congress of April 6, 1917 (40 Stat. 429, ch. 1). Armistice signed
near Compiègne, France, November 11, 1918. Terminated July 2, 1921, by Joint Resolution (42
Stat. 105, ch. 40, 1).
World War I Against Austria-Hungary
Declared by Joint Resolution of Congress, December 7, 1917 (40 Stat. 429, ch. 1). An armistice
signed near Compiègne, France, November 11, 1918. Terminated July 2, 1921, by Joint
Resolution of Congress (42 Stat. 106, ch. 40, 3).
World War II
December 7, 1941, through December 31, 1946, inclusive. If the veteran was in service on
December 31, 1946, continuous service before July 26, 1947, is considered World War II service.
Code of Federal Regulations, 3.2 (d).
Note: During World War II, war was officially declared with six countries. The war with each was
not over until the effective date of the Treaty of Peace. Note also the confusion cited below over
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which day is the official Victory in Europe Day (V-E Day)5 and Victory Over Japan Day (V-J
Day).6
World War II with Germany
Declared by Joint Resolution of Congress, December 11, 1941 (55 Stat. 796, ch. 564). German
representative Colonel General Alfred Jodl signed the unconditional act of surrender to Allied
representatives in a Riems, France schoolhouse on May 7, 1945. A second German surrender
ceremony was held on May 8 in Berlin at the insistence of the U.S.S.R. Cessation of hostilities
declared as of noon, December 31, 1946, by presidential proclamation of December 31, 1946
(Proc. no. 2714, 61 Stat. 1048). State of war with the “government of Germany” terminated
October 19, 1951, by Joint Resolution of Congress of that date (65 Stat. 451, ch. 519), by
Presidential Proclamation 2950, October 24, 1951. No peace treaty with Germany signed.
World War II with Japan
Declared by Joint Resolution of Congress, December 8, 1941 (55 Stat. 795, ch. 561). Japanese
representatives publicly sign unconditional surrender document on the deck of the U.S.S.
Missouri
anchored in Tokyo Bay on September 2, 1945. President Truman proclaimed this date
Victory over Japan Day or V-J Day. Cessation of hostilities declared as of 12 noon, December 31,
1946, by presidential proclamation of December 31, 1946 (Proc. no. 2714, 61 Stat. 1048).
Terminated by Multilateral Treaty of Peace with Japan, signed at San Francisco, September 8,
1951 (3 UST 3329), and ratified March 20, 1952, effective April 28, 1952.

5 May 7, 1945, is listed as V-E day in commentary about signing the first German surrender document in Historic
Documents of World War II
by Walter Consuelo Langsam (Westport, CT: Greenwood Press, 1958), p. 144. However,
May 8, 1945, is cited as V-E day in The Encyclopedia of American Facts and Dates, p. 528; as the “Official V-E Day”
in Louis L. Snyder, Louis L. Snyder’s Historical Guide to World War Two (Westport, CT: Greenwood, 1982), p. 736;
and the World Almanac of World War II, ed. Brigadier Peter Young (New York: Pharos Books, 1981), p. 347, states in
its chronology for May 8, “The British and Americans celebrate VE Day (Victory in Europe Day). Truman, Churchill
and King George VI all make special broadcasts.” Although President Truman did not officially proclaim May 7 as V-
E (Victory in Europe) Day, he did proclaim Sunday, May 13, 1945, a day of prayer. To make for more confusion, his
May 8, 1945, Proclamation 2651, proclaiming May 13 as a day of prayer, is titled, “Victory in Europe; Day of Prayer”
(3 CFR, 1943-1948 Comp.), p. 55. In addition, his May 8 news conference in which he proclaims May 13 a day of
prayer is titled, “The President’s News Conference on V-E Day”—Public Papers of the Presidents of the United States.
Harry S. Truman, 1945
(Washington: GPO, 1961), p. 43.
6 In his news conference of August 14, 1945, announcing news of the Japanese government’s complete acceptance of
terms of surrender, President Truman states, “Proclamation of V-J Day must wait upon the formal signing of the
surrender terms by Japan.”—Public Papers, p. 216. The proclamation of September 2 as V-J Day was given in his
September 1, 1945, “Speech to the American People After the Signing of the Terms of Unconditional Surrender by
Japan.”—Public Papers, p. 254. However, no formal, numbered proclamation was apparently issued. Both August 14,
the day of President Truman’s announcement of the Japanese surrender, and September 2, the official day proclaimed
by President Truman in his speech, are cited as V-J Day in Chase’s Calendar of Events 2002 (New York: McGraw-
Hill, 2002), pp. 421 and 555. August 15 is cited as V-J Day by The Encyclopedia of American Facts and Dates, 9th ed.,
by Gordon Carruth (New York: Harper Collins, 1993), p. 530. August 15, on which the Japanese Emperor made his
historic broadcast to the Japanese people telling of Japan’s surrender, is cited as V-J Day in The World Almanac of
World War II
, p. 353.
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World War II with Italy
Declared by Joint Resolution of Congress, December 11, 1941 (55 Stat. 797, ch. 565). Cessation
of hostilities declared as of noon December 31, 1946, by presidential proclamation of December
31, 1946 (Proc. no. 2714, 61 Stat. 1048). Terminated by Treaty of Peace dated at Paris, February
10, 1947 (61 Stat. 1247), effective September 15, 1947.
World War II with Bulgaria
Declared by Joint Resolution of Congress, June 5, 1942 (56 Stat. 307, ch. 323). Cessation of
hostilities declared as of noon December 31, 1946, by presidential proclamation of December 31,
1946 (Proc. no. 2714, 61 Stat. 1048). Terminated by Treaty of Peace dated at Paris, February 10,
1947 (61 Stat. 1915), effective September 15, 1947.
World War II with Hungary
Declared by Joint Resolution of Congress, June 5, 1942 (56 Stat. 307, ch. 324). Cessation of
hostilities declared as of noon December 31, 1946, by presidential proclamation (Proc. no. 2714,
61 Stat. 1048). Terminated by Treaty of Peace dated at Paris, February 10, 1947 (61 Stat. 1757),
effective September 15, 1947.
World War II with Romania
Declared by Joint Resolution of Congress, June 5, 1942 (56 Stat. 307, ch. 325). Cessation of
hostilities declared as of noon December 31, 1946, by presidential proclamation of December 31,
1946 (Proc. no. 2714, 61 Stat. 1048). Terminated by Treaty of Peace dated at Paris, February 10,
1947 (61 Stat. 1757), effective September 15, 1947.
Korean Conflict
June 27, 1950, through January 31, 1955, inclusive. Code of Federal Regulations, 3.2 (e).
On June 25, 1950, North Korean Communist forces attacked South Korean positions south of the
38th parallel, leading to an immediate United Nations (U.N.) Security Council resolution calling
for a cease-fire and withdrawal of the North Korean forces. On June 26, President Truman
ordered U.S. air and sea forces in the Far East to aid South Korea. On June 27, the U.N. Security
Council adopted a resolution asking U.N. members for assistance in repelling the North Korean
armed attack and in restoring peace and security in the area. On June 30, the President stated that
he had authorized the use of certain U.S. air and ground units wherever necessary. No declaration
of war was requested of Congress. An armistice signed at Panmunjom, Korea, on July 27, 1953,
between U.N. and Communist representatives (4 UST 234; TIAS 2782). No peace treaty ever
signed.
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Vietnam Era
The period beginning on February 28, 1961, and ending on May 7, 1975, inclusive, in the case of
a veteran who served in the Republic of Vietnam during that period. The period beginning on
August 5, 1964, and ending on May 7, 1975, inclusive, in all other cases. Code of Federal
Regulations
, 3.2 (f).
Tonkin Gulf Resolution
No declaration of war was requested of Congress. Instead, there was a Joint Resolution of
Congress to promote the maintenance of international peace and security in Southeast Asia stated
in part that the Congress “approves and supports the determination of the President, as
Commander in Chief, to take all necessary measures to repel any armed attack against the forces
of the United States and to prevent any further aggression.” H.J.Res. 1145, P.L. 88-408, August
10, 1964 (78 Stat. 384). Agreement Ending the War and Restoring Peace in Vietnam signed in
Paris, January 27, 1973 (TIAS 7674). Joint communiqué implementing the agreement and
protocols of January 27, 1973, signed at Paris and entered into force, June 13, 1973.
Conflicts in Lebanon 1982-1983 and Grenada 1983
U.S. Marines deployed on August 21, 1982, and September 29, 1982, were part of a temporary
multinational force in Lebanon. S. 639, P.L. 98-43 (Lebanon Emergency Assistance Act of 1983).
On October 25, 1983, U.S. troops were deployed to Grenada “to restore law and order” and to
protect American lives at the request of the members of the Organization of Eastern Caribbean
States. See CRS Report RL32170, Instances of Use of United States Armed Forces Abroad, 1798-
2008
, for both Lebanon and Grenada.
Persian Gulf War
August 2, 1990, through April 6, 1991, when Iraq officially accepted cease-fire terms. Congress
passed H.J.Res. 77, Authorizing the Use of Military Force Against Iraq, the same day it was
introduced (January 12, 1991), and it was signed by the President on January 14, 1991 (P.L. 102-
1). Operation Desert Storm and the air war phase began at 3 a.m. January 17, 1991 (January 16, 7
p.m. Eastern Standard Time). Allied ground assault began at 4 a.m. February 24 (February 23, 8
p.m. EST). Cease-fire declared at 8:01 a.m. February 28, 1991 (12:01 a.m. EST).7 Cease-fire
terms negotiated at Safwan, Iraq, March 1, 1991.8 Iraq officially accepted cease-fire terms, April

7 Cease fire—“A command given to any unit or individual firing any weapon to stop engaging the target.” Department
of Defense Dictionary
, p. 65.
8 This agreement is actually a transcript of the discussion held at Safwan Airfield, Iraq, between Coalition participants,
U.S. Gen. M. Norman Schwarzkopf and Lt. Gen. Khalid of the Joint Arab Forces, and Iraqi participants, Lt. Gen.
Sultan Kasim Ahmad, Chief of Staff of the Ministry of Defense, and Lt. Gen. Sala Abud Mahmud, III Corps
Commander.
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6, 1991.9 Cease-fire took effect April 11, 1991. Currently, the Code of Federal Regulations, 3.2 (i)
does not list an official end date.
Current Conflicts in Afghanistan and Iraq
Shortly after the terrorist attacks in the United States on September 11, 2001, President George W.
Bush called on Afghanistan’s leaders to hand over Osama bin Laden and other al Qaeda leaders
and close their terrorist training camps. He also demanded the return of all detained foreign
nationals and the opening of terrorist training sites to inspection.10 These demands were rejected.
Operation Enduring Freedom (OEF)
Operations began with U.S. military forces deployed on October 7, 2001, and are ongoing in
Afghanistan and in other nations. On March 27, 2009, President Barack Obama announced a new
strategy in Afghanistan and Pakistan and ordered the deployment of 17,000 troops that had been
previously requested by General David McKiernan.11 In President Obama’s “Address to the
Nation on the Way Forward in Afghanistan and Pakistan” at West Point on December 1, 2009, he
stated that “it is in our vital national interest to send an additional 30,000 U.S. troops to
Afghanistan. After 18 months, our troops will begin to come home. These are the resources that
we need to seize the initiative, while building the Afghan capacity that can allow for a responsible
transition of our forces out of Afghanistan.”12 President Obama further stated that the 30,000
additional troops will deploy in the first part of 2010 to target the insurgency and secure key
population centers that will allow for the eventual transfer of U.S. forces out of Afghanistan in
July of 2011.13
Operation Iraqi Freedom (OIF)
On March 17, 2003, in an address to the nation, President Bush gave Iraqi President Saddam
Hussein and his sons a 48-hour ultimatum to leave Iraq.14 On March 19, 2003, President Bush
announced to the nation that the early stages of military operations against Iraq had begun.15 In a
May 1, 2003, address to the nation, President Bush declared that “major military combat actions
in Iraq have ended.”16 U.S. forces remain in Iraq.

9 Acceptance is in the form of a letter to the U.N. Security Council accepting the terms of U.N. Resolution 687 (U.N.
document S22485, April 11, 1991).
10 President George W. Bush, Address Before A Joint Session of Congress on the United States Response to the
Terrorist Attacks of September 11
, September 24, 2001.
11 The White House, Office of the Press Secretary, Remarks By the President on a New Strategy for Afghanistan and
Pakistan, at http://www.whitehouse.gov/the_press_office/Remarks-by-the-President-on-a-New-Strategy-for-
Afghanistan-and-Pakistan.
12 The White House, Office of the Press Secretary, Address to the Nation on the Way Forward in Afghanistan and
Pakistan at http://www.whitehouse.gov/the-press-office/remarks-president-address-nation-way-forward-afghanistan-
and-pakistan.
13 Ibid.
14 Weekly Compilation of Presidential Documents, March 24, 2003, vol. 39, no. 12, pp. 338-341.
15 Ibid., pp. 342-343.
16 Ibid., May 5, 2003, vol. 39, no. 18, pp. 516-518.
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On January 1, 2010, a ceremony at Camp Victory in Baghdad marked the end of the
Multinational Forces - Iraq (MNF-I) and the beginning of United States Forces - Iraq (USF-I),
which merges five major command groups into one single headquarters command.17 As General
David Petraeus, U.S. Central Command, noted “this ceremony marks another significant
transition here in Iraq. It represents another important milestone in the continued drawdown of
American Forces.”18 Troops from 30 countries served in MNF-I since 2003.
There are no termination dates for these current conflicts.

Author Contact Information

Barbara Salazar Torreon

Information Research Specialist
btorreon@crs.loc.gov, 7-8996



17 U.S Army Website, New Command Marks Milestone in Iraq, January 2, 2010, at http://www.army.mil/-news/2010/
01/02/32437-new-command-marks-milestone-in-iraq/?ref=news-middleeast-title5.
18 Ibid.
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