America and England: For the two countries that share a language and a heritage, the conflict began at the dawn of the American Civil War. Just as America was about to tear itself to pieces, Britain itself committed an act of war by seizing a U.S. packet ship. In retaliation, the Confederate States rejoined the Union and took up arms against England. Repulsing a British invasion, and defeating Her Majesty's Army first in Canada, then in Mexico, then in Ireland, American pride and power swelled. Britain, like a wounded lion, howled in shame and anger. Now, Queen Victoria's empire is more dangerous than ever before, turning against the Irish on her own soil, flexing her naval might, and all but forcing a weary President Lincoln to authorize the next step in a headlong journey toward war.