It also undermines their position that the South never actually left the Union because you can not leave the Union. And if the Confederates are still American citizens, you sacrifice a hell of a lot of legitimacy to let foreign troops attack them.Another problem would be the Union's (un)willingness to accept explicit foreign help. Needing external support to put down a rebellion is not a good look for any country, particularly not in the prestige-obsessed 19th century.
True. Just think of the propaganda coup the original rebels had when the British government decided to send Hessian soldiers to help keep order in its North American colonies.It also undermines their position that the South never actually left the Union because you can not leave the Union. And if the Confederates are still American citizens, you sacrifice a hell of a lot of legitimacy to let foreign troops attack them.
You might see more individual Brits volunteer to fight for the Union (although there were plenty who did so in OTL) but direct intervention isn't going to happen. Lincoln would see it as an affront to Union sovereignty and although Palmerston was an abolitionist he wasn't going to help because he disliked the USA.I read somewhere a few years back that if the Trent Affair never happened the British might have eventually sided with the Union. Anyone have any thoughts on this?