Answer:
Economic Gain. Often wars are caused by one country's wish to take control of another country's wealth.
Territorial Gain. A country might decide that it needs more land, either for living space, agricultural use, or other purposes.
Religion. Religious conflicts often have very deep roots.
Nationalism. Nationalism in this context essentially means attempting to prove that your country is superior to another by violent subjugation.
Revenge. Seeking to punish, redress a grievance, or simply strike back for a perceived slight can often be a factor in the waging of war.
Explanation:
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