Noun
coalition of the willing (plural coalitions of the willing)
(politics) A group of countries whose leaders have been persuaded by another to take up a specific task, usually in the context of an invasion or war.
Yesterday, the president met with a group he calls the coalition of the willing. Or, as the rest of the world calls them, Britain and Spain. Jon Stewart
America must continue diplomacy, even as we continue the war, to expand the coalition of the willing to share the burden of war and to share the responsibility and the economic cost of rebuilding Iraq. Barbara Mikulski