Hosea prophesied in the northern kingdom of Israel to return to the Lord.
Joel prophesied to Judah about the day of the Lord.
Amos prophesied to northern kingdom of Israel about their judgement.
Obadiah prophesied to Edom about how pride is deceitful.
Jonah prophesied to Ninevah to repent from their sinful ways.
Micah prophesied to Judah about their present judgement and future blessing.