Disarming illegal weapons  A second possible justification for intervention is when the state that is intervening against is itself breaking international law such as the Chemical Weapons Convention or the Nuclear Non-Proliferation Treaty. The intervention would then be to force compliance of the treaty; this would mean forcible disarmament of illegal weapons. In the case of Syria the country could be deemed to have violated its own legal obligations due to its having broken the 1925 Geneva Protocol [1] that bans the use of chemical weapons. Since manufacturing and possession of these weapons is banned if it is considered that having such weapons is a ‘gross violation of international law’ then a limited use of force to destroy these weapons could be considered to be legal. [2] This could be considered to be analogous to the police stepping in to confiscate a banned weapon, with no police internationally other states have to be the ones to step in.  [1] 1925 Geneva Protocol, League of Nations, 17 June 1925,   [2] Dr Wolff Heintschel, ‘Viewpoints: Is there legal basis for military intervention in Syria?’, BBC News, 29 August 2013,