Is it illegal to fight for other countries at war this is about private citizens of one country getting involved for no fee to assist the fighting efforts of other countries at a state of civil war?

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Can other countries be involved in anthor countries civil war?

Answer . No, it wasn't like any other countries had any involvement in France's civil war, like fighting against Spain and Russia and other countries, and it's not like the

What other countries supported the civil war?

None. All other countries proclaimed neutrality. The North's actions towards a British ship that was bringing Confederate diplomats to Europe to request the recognition of the