In the strategy game Sid Meier's Alpha Centauri one of the playable factions is called the Peacekeepers, acing as a UN type representative on a colanised planet in the future.
Peacekeeper (or PeaceKeeper, Peace Keeper or Peace-Keeper) has many meanings: Generally - Peacekeepers, although comprised of soldiers, are different than a traditional military force, in that peacekeepers, use minimal force, distribute humanitarian aid, and on rare occasions take offensive action. Peacekeepers are generally viewed as an outside impartialthird party force, who has no stake in the conflict, except in maintaining peace.
Inter-American Peace Force - Established, by the Organization of American States, on 23 May 1965, after America's intervention in the Dominican Republic, it largely consisted of over 42,600 United States military personnel, plus the following troops were sent by each country; Brazil 1130, Honduras 250, Paraguay 184, Nicaragua 160, Costa Rica 21 military police, and El Salvador 3 staff officers. Brazil eventually took over from the United States.