Cyprus is divided by the 'green line' and UN troops are there to keep the peace between the two factions.

The Green Line refers to a physical border that separates the Republic of Cyprus from the Turkish Republic of Northern Cyprus. It was established after the intercommunal violence in the 1960s.

Officially just called the buffer zone but erroneously called the 'Green Line'. The latter is actually the line drawn through the capital, Nicosia, by the British during their rule, to separate fighting Turkish and Greek Cypriots into easily policed zones. The line was drawn on a map with a green crayon by the British Governor.

If you mean Nicosia, Cyprus...yes Cyprus is part of the UN. the UN actually 'occupies' the green line that runs through Nicosia between the North (occupied by Turkish troops) and the South.

Yes.