How would foreign intervention effect on civil war and war of 1812

Any unwarring foreign intervention would have a immediate impact on the outcome of both civil war and war of 1812, as for the civil war, it would led to unability of north perserve the union, and war of 1812, the cripple American economic won't able to support a international conflict.

For the civil war, the most decisive campaign of the American Civil War was waged in neither Virginia, nor Pennsylvania, no along the Missippi River, but rather in Great Britian. Northern military advantages in the prosecution of the war effort would have been completely negated by serious diplomatic setback in Great Britain. In order to win the civil war, the NOrth had to provent Great Britain from entering the conflict . British intervention whether in the from of actually entering the war on the side of the south. official recognition of the confederacy, foreign mediation, or call fro an armistice , would have been a diplomatic disaster for North and a fatal blow in its attempt to re-unify the nation. Military setbacks on teh battlefield were not nearly threatening as diplomatic setbacks abroad. North had greater manpower a stronger adn more balanced economy, an industrial infrastructure , and a better equipped army;yet inorder for these advantages to translate into military victory at home, the north first needed to ensure that domestic conflict did no spread to an international war. Intervention of British would have a significant consequences on whether north can perserve the union. The intervention of foreign power also would have a significant impact on America. During the war, British navy blockade along the American coast by raiding parties almost at will, American economic life was cripple. Customs revenues were choked off, and near the end of the war the bankrupt Treasury was unable to meet its maturing obligation. If at time, any of the country became alliance of Britain, it would inevitably lead to American's defeat. Because unable to pull any of the foreign help, England was willing to compromise.