War is a situation or a period of fighting between countries or groups of people. A war generally involves the use of weapons, a military organization and soldiers. War is a situation in which a nation enforces its rights by using force. Not every armed conflict is a war. A fight between individuals, between gangs, drug cartels, etc. is not considered a war. However, most wars are called armed conflicts. International humanitarian law is a set of rules that tries to limit the effects of wars. International Humanitarian Law recognizes two kinds of wars. These are: