Turd-polishing linguistic quibble, designed to emphasise the good intentions motivating certain foreign policy disasters.
A term first coined by Alcoholics Anonymous, an intervention begins when several hundred thousand heavily-armed friends drop by, before relieving ones psychotic ruler of his non-existent nuclear weapons programs and settling down to sell ones natural resources to their friends at super-bonanza knock-down prices.
Used explicitly to disambiguate an intervention - a righteous moral crusade for freedom, truth and justice - from a deliberate war of aggression. The difference is vital in law, since one is awarded Nobel prizes for the first, and hung like a common cutthroat for the second.
"Professor Taylor's inability to distinguish an "invasion of Iraq" - as if a state's legitimate sovereignty had been violated by the removal of a bestial and kleptocratic regime - from an intervention in Iraq is merely the least of the many components in the evidence of his stupidity." - Oliver Kamm