What wars has the United States participated in from the beginning of the 20th century up to now?

Question

Actually i was looking for the "small", "insignificant" wars. I knew all the wars you listed.

Answer 1

Wars and battles (And they shall hear of wars, and rumors of wars.)

* World War I, 1917 – 1918
o European Theatre, 1917 - 1918
+ Spring Offensive, 1918
+ Third Battle of the Aisne, 1918
+ Battle of Belleau Wood, 1918
+ Second Battle of the Marne, 1918
+ Battle of Château-Thierry, 1918
+ Battle of Hamel, 1918
+ Hundred Days Offensive, 1918
o Battle of the Atlantic, 1917 - 1918
* World War II, 1941 – 1945
o Pacific War, 1941 - 1945
+ Burma Campaign, 1941 - 1945
+ New Guinea Campaign, 1942 - 1945
+ Aleutian Islands Campaign, 1941 - 1943
+ Guadalcanal Campaign, 1942
+ Solomon Islands Campaign, 1943
+ Gilbert and Marshall Islands Campaign, 19431 - 1944
+ Mariana and Palau Islands Campaign, 1944
+ Philipines Campaign, 1944 - 1945
+ Ryukyu Islands Campaign, 1945
+ Borneo Campaign, 1945
+ Japan Campaign, 1945
o African Theatre, 1942 - 1943
+ Desert War, 1941 - 1943
+ Mediterranean Campaign, 1942 - 1945
o European Theatre, 1944 - 1945
+ Italian Campaign, 1943 - 1945
+ Operation Overlord, 1944
+ Operation Dragoon, 1944
+ Operation Market Garden, 1944
+ Battle of Scheldt, 1944
+ Battle of Hurtgen, 1944 - 1945
+ Battle of Aachen, 1944
+ Battle of the Bulge, 1944 - 1945
+ Operation Plunder, 1945

* Cold War, 1947 - 1990
o Korean Conflict, 1950 - 1953
+ Battle of Osan, 1950
+ Battle of Pusan Perimeter, 1950
+ Battle of Inchon, 1950
+ Battle of Pakchon, 1950
+ Battle of Chosin Reservoir, 1950
+ Battle of the Twin Tunnels, 1951
+ Operation Ripper, 1951
+ Operation Courageous, 1951
+ Operation Tomahawk, 1951
+ Battle of Yultong Bridge, 1951
+ Battle of the Imjin River, 1951
+ Battle of Kapyong, 1951
+ Battle of Bloody Ridge, 1951
+ Battle of Heartbreak Ridge, 1951
+ Battle of Sunchon, 1951
+ Battle of Hill Eerie, 1952
+ Attack on the Sui-ho Dam, 1952
+ Battle of Old Baldy, 1952 - 1953
+ Battle of the Hook, 1953
+ Battle of Pork Chop Hill, 1953
+ Outpost Harry, 1953
o Operation PBFORTUNE, 1952
o Operation PBSUCCESS, 1954
o Operation Blue Bat, 1958
o Bay of Pigs Invasion, 1961
o Sino-Indian Border Conflict, 1962
o Vietnam Conflict, 1962 - 1973
+ Operation Ranch Hand, 1962 - 1971
+ Battle of A Shau, 1963
+ Operation Barrel Roll, 1964
+ Battle of Binh Gia, 1964 - 1965
+ Battle of Pleiku, 1965
+ Operation Flaming Dart, 1965
+ Battle of A Shau, 1963
+ Battle of Xa Cam My, 1966
+ Battle of Long Tan, 1966
+ Operation Attleboro, 1966
+ Operation Cedar Falls, 1967
+ Operation Junction City, 1967
+ Battle of Hill 881, 1967
+ Battle of Ong Thanh, 1967
+ Battle of Dak To, 1967
+ Tet Offensive, 1968
+ Battle of Khe Sanh, 1968
+ First Battle of Saigon, 1968 - 1969
+ Battle of Hue, 1968
+ Battle of Lang Vei, 1968
+ Battle of Lima Site 85, 1968
+ Battle of Kham Duc, 1968
+ Operation Dewey Canyon, 1969
+ Tet 1969, 1969
+ Battle of Hamburger Hill, 1969
+ Operation Commando Hunt, 1969 - 1972
+ Operation Menu, 1970
+ Cambodian Campaign, 1970
+ Battle of Fire Support Base Ripcord, 1970
+ Battle of Snuol, 1971
+ Battle of FSB Mary Ann, 1971
+ Easter Offensive, 1972
+ Operation Linebacker, 1972
+ Operation Linebacker II, 1972
+ Battle of Loc Ninh, 1972
+ Battle of An Loc, 1972
+ Fall of Saigon, 1975
+ Mayagüez incident, 1975
o Operation Powerpack, 1965 - 1966
o Operation Eagle Claw, 1980
o Operation Urgent Fury, 1983
o Iran-Iraq War, 1987 - 1989
+ Operation Earnest Will, 1987 - 1988
+ Operation Prime Chance, 1987 - 1989
+ Operation Eager Glacier, 1987 - 1988
+ Operation Nimble Archer, 1987
+ Operation Praying Mantis, 1988
o Operation Just Cause, 1989 - 1990

* Persian Gulf War, 1991
o Operation Desert Storm, 1991
o Operation Desert Shield, 1991

* Somali Civil War, 1992 - 1994
o Operation Provide Relief, 1992
o Operation Restore Hope, 1992 - 1994

* Yugoslav Wars, 1994 - 1999
o Bosnian Conflict, 1994 - 1995
o Kosovo Conflict, 1997 - 1999


[edit] 2000s

* War on Terrorism, 2001 - present
o Operation Enduring Freedom - Afghanistan 2001 - present
o Operation Enduring Freedom - Philippines 2002 - present
o Operation Enduring Freedom - Horn of Africa 2002 - present
o Operation Iraqi Freedom, 2003 - present
o Insurgency in Saudi Arabia, 2003 - present
o Waziristan War, 2004 - present
o Fatah-Hamas Conflict, 2006 - present
o War in Somalia, 2006 - present
o Operation Enduring Freedom - Trans Sahara 2007 - present

Answer 2

World War 1, World War 2, The Korean War, (i dont know if you would count the cold war because there was actually no fighting just missle threats between the US and the USSR.), Vietnam, the war against the sovietes in afghanastan, Desert Storm (the first one in 90s or the gulf war,) the second gulf war, (another desert storm, the war on terror, the war in afghanistan/ iraq, whatever you wnna call it)

Answer 3

World War I, World War II, Desert Storm, the Vietnam War, Iraq, the Cold War, and Afghanistan.

Some of those may not be considered "war," but they were still significant events.

Answer 4

According to the Stanford Encyclopedia of Philosophy "War should be understood as an actual, intentional and widespread armed conflict between political communities."

Using that definition:
WW1
WW2
Korean Conflict (not declared but meets the criteria)
Viet Nam ( see above)
Grenada (ditto)
Panama (ditto)
Bosnia (ditto)
Gulf War I
Gulf War II