Why do countries have wars?

A big reason why most countries have wars is because they have conflicts. Although, these are not caused by only one type of thing. Different situations cause conflicts between countries and stress the diplomacy between them if there is a diplomacy at all. Some of these conflicts occur by national leaders arguing over the terms of peace or such issues. Sometimes it is just because one country has offended the others traditions. It can also be due to a violation of diplomatic terms and conclude to war. There is a largely extended list of causes and what I have shown here are just a few examples.