Did you even read the link you provided? I was talking about UN soldiers keeping the peace in Ethiopia, not some terroristhunt.
And about the US giving most military and monetary aid... That is a bit obvious isn't it? The US is one of the biggest countries on this world, and most dollars are in the US as well. If you want to compare monetary and military you should talk relatively. Dollars/inhabitant, soldiers/inhabitants.
The UN did not exist during Hitler or Stalin so in those cases: nothing ofcourse. And I said it before: the UN is not the best institution to save the world, but so far it is the best there is, and the ideas are good. And those ideas were born because of evil.