Question

Why do nations form alliances? Give examples of different kinds of alliances and explain their purposes

Answer 1

Nations form alliances so when war occurs or is on the brink they will have another nation to help defend themselves and confront their opponents, whether the war is verbal ( threatening words) or physical conflict. Alliances are just people they can depend on to have their back and in return they have theirs.
You can have national alliances, friendship alliances, family alliances, competitive alliances, corporate alliances, etc.

Answer 2

The practice of forming powerful alliances that would eventually lead to the outbreak of World War I in 1914 began during the 18th century as a result of nations banding together to either promote or prevent the aims of Napoleon Bonaparte.
The formation of alliances between states is based on the balance of power theory.You can have national alliances, friendship alliances, family alliances, competitive alliances, corporate alliances, etc.
hope this helps