Here it is, you will actually have to read a paragraph or two above this to actually understand it, but the rules of war make this "Civil War" an international war by these two paragraphs, regardless of what S. P. Chase ruled.

"As soon as the news of the attack on Fort Sumter, and the organization of a government by the seceding States, assuming to act as belligerents, could become known in Europe, to wit, on the 13th of May, 1861, the Queen of England issued her proclamation of neutrality, 'recognizing hostilities as existing between the Government of the United States of American and certain States styling themselves the Confederate States of America.' This was immediately followed by similar declarations or silent acquiescence by other nations.

After such an official recognition by the sovereign, a citizen of a foreign State is estopped to deny the existence of a war with all its consequences as regards neutrals. They cannot ask a Court to affect a technical ignorance of the existence of a war, which all the world acknowledges to be the greatest civil war known in the history of the human race, and thus cripple the [67 U.S. 635, 670] arm of the Government and paralyze its power by subtle definitions and ingenious sophisms."

george