The Hague Convention
of 1899, Declaration III, prohibits the use in warfare of bullets that easily expand or flatten in the body.
This is often incorrectly believed to be prohibited in the Geneva Conventions
, but it significantly predates those conventions, and is in fact a continuance of the St. Petersburg Declaration of 1868
, which banned exploding projectiles of less than 400 grams, as well as weapons designed to aggravate injured soldiers or make their death inevitable. NATO
members do not use small arms ammunition that is prohibited by the Hague Convention.