the Federal Bureau of Investigation

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

the United Arab Emirates

(history) the Federal Republic of Germany (official name of former West Germany) / the Federal Republic of Germany (official name of current Germany)

(historical) Federal Republic of Yugoslavia

Commonwealth of Puerto Rico (the official name of Puerto Rico, a commonwealth, island and dependent territory of the United States)

the Federal Republic of Nigeria

the Republic of the Union of Myanmar

the Federative Republic of Brazil

the Federal Republic of Somalia