The USA has bombed the following countries between 1945 and 1999:

China (1945-46 & 1950-53)
Korea (1950-53)
Guatemala (1954 & 1960)
Indonesia (1958)
Cuba (1959-60)
Congo (1964)
Peru (1965)
Laos (1964-73)
Vietnam (1961-73)
Cambodia (1969-70)
Guatemala (1967-69)
Grenada (1983)
Libya (1986)
El Salvador & Nicaragua (all of the 1980s)
Panama (1989)
Iraq (1991-present)
Sudan (1998)
Afghanistan (1998)
Yugoslavia (1999)

None of these bombing campaigns led to the establishment of humane democracies in the countries.