It is this: Whenever a rebellion in any country has assumed such extensive magnitude as no longer to be a simple insurrection, which may be put down by police measures or regulations, but has come to such a degree that mighty armies are opposed to each other, although the revolted portion may not have been acknowledged by any nation, yet belligerent rights must be granted to it.
— from Trial of the Officers and Crew of the Privateer Savannah, on the Charge of Piracy, in the United States Circuit Court for the Southern District of New York by A. F. (Adolphus Frederick) Warburton