What are the potential illegal actions involving armed groups or mercenaries from a specific state that may be considered as acts of aggression against another state?  
Sending gangs, armed groups, irregular forces, or mercenaries from a particular state, in the name of the state, to carry out armed acts against another state that are deemed as dangerous as the acts of aggression listed in Item 3 of this Article, or involving the active participation of that state in this act.