Teribus, since WW11, the U.S.A. has bombed 21 countries:

China (1945-46 & 1950-53)
Korea (1950-53)
Guatemala (1954 & 1960 & 1967-69)
Indonesia (1958)
Cuba (1959-61)
Congo (1964)
Peru (1965)
Laos (1964-73)
Vietnam (1961-73)
Cambodia (1969-70)
Grenada (1983)
Lebanon (1983-84)
Bosnia (1985)
Libya (1986)
El Salvador (all of the 1980's)
Nicaragua (all of the 1980's)
Panama (1989)
Iraq (1991-????)
Sudan (1998)
Afghanistan (1998 & 2001-2)
Former Yugoslavia (1999)

I can't think of one instance where these bombings led to the establishment of humane democracies in these countries.