WW1 yes. WW2 I think we had to get involved. Since then....
1950 Formosa (Taiwan)
1950-1953 Korea
1953-1954 Formosa (Taiwan)
1955-1975 Vietnam
1956 Egypt
1958 Lebanon
1962 Cuba
1962 Thailand
1962-1975 Laos
1964 Congo (Zaire)
1965 Dominican Republic
1965-1973 Cambodia
1967 Congo (Zaire)
1976 Korea
1978 Congo (Zaire)
1980 Iran
1981 El Salvador
1981 Libya
1981-1989 Nicaragua
1982-1983 Egypt
1982-1983 Lebanon
1983 Chad
1983 Grenada
1986 Bolivia
1986 Libya
1987-1988 Iran
1988 Panama
1989 Bolivia
1989 Colombia
1989 Libya
1989 Peru
1989 Philippines
1989-1990 Panama
1990 Saudi Arabia
1991 Congo (Zaire)
1991-1992 Kuwait
1991-1993 Iraq
1992-1994 Somalia
1993-1994 Macedonia
1993-1996 Haiti
1993-2005 Bosnia
1995 Serbia
1996 Liberia
1996 Rwanda
1997-2003 Iraq
1998 Afghanistan
1998 Sudan
1999-2000 Kosovo
1999-2000 Montenegro
1999-2000 Serbia
2000 Yemen
2000-2002 East Timor
2000-2016 Colombia
2001 – Afghanistan
2001- Pakistan
2001- Somalia
2002-2015 Philippines
2002- Yemen
2003-2011 Iraq
2004
Haiti
c2004- Kenya
2011 Democratic Republic of the Congo
2011-2017 Uganda
2011- Libya
c2012- Central African Republic
c2012- Mali
c2013-2016 South Sudan
c2013- Burkina Faso
c2013- Chad
c2013- Mauritania
c2013- Niger
c2013- Nigeria
2014 Democratic Republic of the Congo
2014- Iraq
2014- Syria
2015 Democratic Republic of the Congo
c2015- Cameroon
2016 Democratic Republic of the Congo
2017- Saudi Arabia
c2017 Tunisia
2019- Philippines
I think we could of done without getting involved in most of these conflicts... and I don't even think this list is particularly inclusive for paramilitary interventions.